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CN-119598605-B - Multi-parameter optimization method of marine integrated kitchen structure based on numerical simulation

CN119598605BCN 119598605 BCN119598605 BCN 119598605BCN-119598605-B

Abstract

The invention relates to a multi-parameter optimization method of a marine integrated kitchen structure based on numerical simulation, which comprises the steps of modeling through parameterization, and (3) obtaining a three-dimensional model of the marine integrated kitchen, carrying out scheme design through an orthogonal test method, and determining a multi-parameter combination needing numerical simulation. And calculating based on Fluent to obtain the integral number result of the pollutant at the sampling point of each parameter combination model. And obtaining the influence sequence of each parameter of the structure on the collection efficiency of the marine integrated cooker through the extremely poor analysis of the result, and obtaining the optimal structure parameter combination to complete the structure optimization. The problems that the indoor airflow organization of the marine kitchen cabin is complex and changeable and the marine integrated kitchen is difficult to make a better design are solved, so that the optimal structural parameter combination with the best collection efficiency of the marine integrated kitchen is determined.

Inventors

  • GU SIQI
  • YU HAOJI
  • WANG WENBIN
  • XU XINGYUAN
  • GU WENHUI

Assignees

  • 中国船舶集团有限公司第七〇四研究所

Dates

Publication Date
20260512
Application Date
20241120

Claims (6)

  1. 1. The multi-parameter optimization method of the marine integrated kitchen structure based on numerical simulation is characterized by comprising the following steps of: Step 1, determining the structure of the marine integrated cooker, and establishing a parameterized three-dimensional structure model of the marine integrated cooker by using modeling software SPACE CLAIM; to verify the scene of the closed kitchen, four walls of the space are windowless and door-less, a strip-shaped fresh air supply opening is arranged at the top of the kitchen, and the fresh air quantity is determined according to the exhaust quantity of the integrated kitchen; The method comprises the steps of establishing a fluid domain model of the integrated kitchen for the ship, respectively carrying out fluid extraction operation at a kitchen hole, namely a fluid inlet, of the three-dimensional model of the integrated kitchen for the ship and at an integrated kitchen smoke outlet, namely a fluid outlet, to form an integrated kitchen inner flow domain, and carrying out fluid extraction operation at a fresh air port of the three-dimensional model of the ship to form an integrated kitchen outer flow domain; setting sampling points for monitoring pollutant concentration for the fluid domain model of the integrated kitchen structure for the ship, and selecting proper sampling positions to display pollutant concentration conditions of all positions in the cabin from 3 dimension directions of points, lines and planes in order to better reflect and compare pollutant distribution states in the cabin of each simulation model in different schemes; Step 2, carrying out scheme design on design parameters of a three-dimensional model of the marine integrated kitchen by adopting an orthogonal test method, taking 5 factors of total air suction quantity, air suction opening width, side suction opening position, top suction opening position and air curtain air quantity of the integrated kitchen as variables, arranging and combining the factors and the variables according to a conventional scheme according to the factors and the variables, and considering the saving of calculation resources, so that the scheme design is carried out by adopting the orthogonal test design, and simultaneously analyzing the influence of a single variable on the collection effect of the integrated kitchen by adopting a control variable method; Step 3, grid division is carried out on the fluid domain model of the kitchen integrated kitchen for the ship; The grid division is carried out by Fluent meshing software, polyhedral and hexahedral Ploy-Hexcore division is selected, five-layer hexahedral grid boundary layers are created at the wall surface of the fluid domain, and the boundary layers can be directly generated in Fluent meshing software; Performing grid independence verification, establishing a plurality of grid quantity models for calculation, and comparing the difference of pressure drop values before and after calculation convergence to improve the calculation efficiency and ensure the accuracy of the result to select the grid quantity of the calculation model; Step 4, naming a fluid domain model of the integrated kitchen range for the ship, and naming the boundary of the fluid domain of the integrated kitchen range including a kitchen hole, a fresh air port, an air curtain inlet, a smoke outlet, a wall and a bottom surface; Setting calculation parameters of a fluid field model of the marine kitchen integrated cooker in fluid software Fluent, selecting Realizable k-epsilon turbulence model for the fluid field model of the marine kitchen integrated cooker, defining the fluid field material as air and the reference pressure as one atmosphere, setting wall surface boundary conditions and inlet and outlet physical parameters for the fluid field model of the marine kitchen integrated cooker, using steam to simulate oil smoke pollutants and taking 2/3 height of the kitchen as a generating source to emit outwards, setting a fresh air inlet as a speed inlet boundary, setting an air curtain inlet as a speed inlet boundary, setting a smoke outlet as a pressure outlet boundary, setting the reference pressure as standard atmosphere, and setting cabin walls and the ground as non-slip wall surface boundary conditions; Step 6, setting a residual curve in the fluid software Fluent, and establishing a monitoring curve according to the total mass flow rate of the inlet and outlet of the fluid domain model of the integrated kitchen for the ship; Step 7, judging whether the calculation process is converged according to the residual curve, the calculation result and the inlet and outlet mass flow rate in the fluid software Fluent, if so, performing post-processing on the calculation result to obtain the integral number result of the pollutant at the sampling point, and if not, adjusting the grid and the boundary condition, and re-calculating until the calculation process is converged; step 8, saving calculation results, and calculating the collection efficiency of pollutants in the kitchen cabins, wherein the steam generation sources are fixed 2 kitchen eyes, and the steam outlet of the whole simulation cabin is a fixed integrated kitchen exhaust port, so that the proportion calculation of the steam concentration of the outlet and the steam generation sources can be carried out, and the collection efficiency of the steam is obtained: Collection efficiency = Step 9, modifying the fluid domain model of the kitchen integrated cooker for the ship according to the calculation parameters of each different test number in the orthogonal test table, and repeating the steps 3-8 to obtain a plurality of simulation results; step 10, performing extremely poor analysis on the simulation result data to obtain the influence of each parameter on the collection efficiency of the marine integrated kitchen, and obtaining the order of influence on the collection efficiency of pollutants; And 11, comparing simulation results to obtain an optimal structural parameter combination of the marine integrated cooker, and repeating the steps 5-8 by adopting the structural parameters of the marine integrated cooker to calculate the pollutant collection efficiency under the structural parameters so as to finish structural optimization.
  2. 2. The multi-parameter optimization method of the marine integrated kitchen structure based on numerical simulation according to claim 1 is characterized in that in the step 1, a parameterized modeling method is adopted, the overall dimension L multiplied by W multiplied by H of the integrated kitchen is 2600 multiplied by 1200 multiplied by 2000mm, two kitchen eyes are arranged, the diameter of each kitchen eye is 800mm, two air suction inlets with the width of 20mm are arranged on the side edge and the top of the integrated kitchen, and the smoke exhaust outlet of the integrated kitchen is arranged on the top and has the size of 296 multiplied by 186mm; The method comprises the steps of determining the structure of a marine kitchen, and establishing a three-dimensional structure model of the marine kitchen, wherein the dimension L multiplied by W multiplied by H of the model is 5000 multiplied by 4000 multiplied by 2100mm, and in order to verify the scene of the closed kitchen, four walls of the space are windowless and door-less, a strip-shaped fresh air supply opening is arranged at the top of the kitchen, and the fresh air quantity is determined according to the exhaust quantity of an integrated kitchen, and the dimension of the fresh air supply opening is 800 multiplied by 200mm.
  3. 3. The multi-parameter optimization method for the marine integrated kitchen structure based on numerical simulation according to claim 1, wherein in step 1, a proper sampling position is selected to display the pollutant concentration condition of each place in the cabin, point A is located in the left breathing zone of the integrated kitchen, point B is located in the right breathing zone of the integrated kitchen, point C is located at the right top of the integrated kitchen, point D is located at the left top of the integrated kitchen, point E is located at the left top of the kitchen cabin, point F is located at the right top of the kitchen cabin, line A is located in the left standing zone of the integrated kitchen, line B is located in the right standing zone of the integrated kitchen, line C is located in the left top zone of the kitchen cabin, line D is located in the right top zone of the kitchen, line E is located in the cooking breathing zone of the integrated kitchen, plane A is located in the left eye section of the integrated kitchen, plane B is located in the right eye section of the integrated kitchen, and plane C is located in the top section of the kitchen cabin.
  4. 4. The multi-parameter optimization method for the marine integrated kitchen structure based on numerical simulation according to claim 1 is characterized in that in the step 2, the total air suction volume variable of the integrated kitchen is 2500m 3 /h、3000m 3 /h、3500m 3 /h、4000m 3 /h, the width variable of an air suction inlet is 15mm, 20mm, 25mm and 30mm, the side suction position variable is 250mm, 350mm, 450mm and 550mm, the top suction position variable is-100 mm, 0mm, 100mm and 200mm, the air curtain air volume variable is 500m 3 /h、700m 3 /h、900m 3 /h、1100m 3 /h, the factors and the variables are arranged and combined according to a conventional scheme, 4 5 total 1024 arrangements and combinations are needed according to the factors and the variables, the scheme design is carried out by taking account of saving calculation resources, meanwhile, the influence of a single variable on the collection effect of the integrated kitchen is analyzed by adopting a control variable method, the orthogonal test design can simultaneously reduce test times on the basis of ensuring test comprehensiveness, the project progress is greatly saved, the air collecting hood has 5 variables, each variable is 4 levels, and an L 16 (4 5 ) orthogonal test scheme is established.
  5. 5. The method for optimizing the multiple parameters of the marine integrated cooker structure based on the numerical simulation according to claim 1, wherein in the step 10, the order of obtaining the influence on the pollutant collecting efficiency is that the total air draft amount, the side draft position, the top draft position, the air curtain air quantity and the air draft opening width are in sequence, and the influence degree on the collecting efficiency of the gas collecting hood is that the total air draft amount, the side draft position, the top draft position, the air curtain air quantity and the air draft opening width are in sequence from large to small.
  6. 6. The multi-parameter optimization method for the marine integrated cooker structure based on numerical simulation according to claim 1 is characterized in that in step 11, the simulation results are compared to obtain the optimal structural parameter combination of the marine integrated cooker, wherein the optimal structural parameter combination is 3000m 3 /h in total air draft, 25mm in air draft opening width, 350mm in side draft position, 0mm in top draft position and 700m 3 /h in air curtain air quantity, the above 5 marine integrated cooker structural parameters are adopted, and the pollutant collection efficiency under the structural parameters can be calculated to be 99.64% by repeating the steps 5-8, so that structural optimization is completed.

Description

Multi-parameter optimization method of marine integrated kitchen structure based on numerical simulation Technical Field The invention relates to the technical field of marine kitchen equipment, in particular to a multi-parameter optimization method of a marine kitchen integrated kitchen structure based on simulation analysis. Background Kitchen cabins are important functional sites indispensable to ships and are also main sites for generating a large amount of oil smoke and steam. Because of the cooking modes of high temperature frying, frying and the like in Chinese cooking, the amount of generated oil smoke is huge, and the kitchen cabin space is narrow, the heat load is large, the ventilation is poor, so that the indoor environment quality is lower. The diffusion of kitchen oil smoke not only influences the work comfort level of the operator in the kitchen, threatens the health of the operator, but also can spread to other cabins, and influences the overall air quality of the ship. Therefore, development of design and optimization of kitchen cabin flue gas collection and treatment equipment, prevention of escape of oil smoke and steam, and improvement of kitchen and surrounding cabin environments are always important points of kitchen design. At present, the research method for determining the structural parameters of the range hood or the integrated kitchen range is mainly an experimental method and a numerical simulation method, and the structural optimization design method based on numerical simulation not only can accelerate the development process of new products, but also can reduce the processing of a prototype and greatly reduce the development cost by analyzing and proving a large number of structural design schemes in the initial stage of design and development. Because the marine kitchen has high tightness and is provided with the exhaust system, the air flow organization in the kitchen cabin is complex and changeable and is influenced by the air quantity, the structure and the like, and the marine integrated cooker cannot be designed in a better way only through single parameter change, therefore, a multi-parameter optimization numerical simulation analysis method for the marine integrated cooker structure is urgently needed. Disclosure of Invention Aiming at the problems that the indoor airflow organization of the marine kitchen room is complex and changeable and the marine integrated kitchen is difficult to make a better design, the multi-parameter optimization method of the marine integrated kitchen structure based on numerical simulation is provided to determine the optimal structure parameter combination with the best collection efficiency of the marine integrated kitchen. The technical scheme of the invention is as follows: a multi-parameter optimization method of a marine integrated kitchen structure based on numerical simulation comprises the following steps: Step1, determining the structure of a marine integrated cooker, and establishing a parameterized three-dimensional structure model of the marine integrated cooker; the design parameters in the three-dimensional model of the marine integrated cooker comprise total air draft of the integrated cooker, width of an air draft inlet, side draft position, top draft position and air curtain air quantity by adopting a parameterized modeling method; determining the structure of a kitchen for a ship and establishing a three-dimensional structure model of the kitchen for the ship; establishing a fluid domain model of the kitchen integrated stove for the ship; Step 2, setting sampling points for monitoring pollutant concentration for the marine integrated kitchen structure; Step 3, carrying out scheme design on design parameters of the marine integrated kitchen structure by adopting an orthogonal test method, arranging an orthogonal test table to be calculated, and respectively establishing a fluid domain model of the marine kitchen integrated kitchen according to the parameters in the table; Step 4, performing grid division on the fluid domain model of the marine kitchen integrated kitchen; The mesh division is carried out by fluent meshing software, polyhedral and hexahedral Ploy-Hexcore division is selected, and hexahedral mesh boundary layers are added at the wall surfaces of the fluid domains; Checking the Quality of the grid, including unit Quality, skew Skewness; performing grid independence verification; step 5, naming the fluid domain model of the integrated kitchen for the ship, wherein the fluid domain model comprises a kitchen hole, a fresh air port, an air curtain inlet, a smoke outlet, a wall and a bottom surface boundary; step 6, setting a fluid flow model in fluid simulation software Fluent, selecting Realizable k-epsilon turbulence model for the fluid field model of the integrated kitchen for the ship, defining fluid field materials, pressure and gravity, setting wall boundary conditions for the fluid field model of the integ