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CN-224202703-U - Wind tunnel rack

CN224202703UCN 224202703 UCN224202703 UCN 224202703UCN-224202703-U

Abstract

The utility model discloses a wind tunnel rack, which relates to the technical field of automobile part testing and aerodynamic measurement, and comprises a wind pipe, wherein a conical cover is fixedly arranged at one end of the wind pipe, a pipe head is fixedly arranged at the other end of the wind pipe, a wind supply assembly is arranged at one end of the conical cover, test assemblies are arranged on the wind pipe and the pipe head, the wind supply assembly comprises a blower, a wind suction port of the blower is provided with a wind valve, the wind tunnel rack is in modularized design, the whole device is convenient to operate, the whole device is composed of a blower module, a control module, a sensor module, a wind tunnel system and a test cavity, standard interfaces are adopted among the modules, rapid assembly, disassembly and maintenance are convenient, the wind tunnel rack is suitable for multi-scene deployment, the real vehicle speed is simulated, the test is accurate, the wind speed of the blower can be accurately regulated through a frequency converter, the full-range vehicle speed wind field from low speed to high speed can be simulated by combining a differential pressure conversion algorithm, the test is more close to the actual running condition, and the reference value of data engineering is improved.

Inventors

  • XIE SHUN
  • YIN ZIJIE
  • GU HONGBO

Assignees

  • 苏州苏勃检测技术服务有限公司

Dates

Publication Date
20260505
Application Date
20250613

Claims (4)

  1. 1. The wind tunnel bench comprises a wind pipe (1) and is characterized in that one end of the wind pipe (1) is fixedly provided with a conical cover (11), the other end of the wind pipe (1) is fixedly provided with a pipe head (12), one end of the conical cover (11) is provided with an air supply assembly (2), and the wind pipe (1) and the pipe head (12) are provided with a test assembly (3); The air supply assembly (2) comprises an air blower (21), an air valve (22) is arranged at an air suction inlet of the air blower (21), and one end of the conical cover (11) is fixedly arranged at one end of the air valve (22); The test assembly (3) comprises a parallel air grid (31) and a test notch (32), wherein the parallel air grid (31) is assembled on the inner wall of the air pipe (1), the test notch (32) is arranged in the middle of one end of the pipe head (12), the test notch (32) is parallel to the parallel air grid (31), and a plurality of pressure sensors (34) are assembled on the pipe head (12).
  2. 2. A wind tunnel bench according to claim 1, characterized in that said wind valve (22) is fitted with a flow sensor (23).
  3. 3. A wind tunnel bench according to claim 1, characterized in that the upper end of the wind pipe (1) is equipped with an anemometer (33).
  4. 4. A wind tunnel bench according to claim 1, characterized in that a number of said pressure sensors (34) are evenly distributed over the tube head (12).

Description

Wind tunnel rack Technical Field The utility model relates to the technical field of automobile part testing and aerodynamic measurement, in particular to a wind tunnel rack. Background With the continuous improvement of requirements of modern automobiles in the aspects of energy conservation and emission reduction, overall automobile performance improvement, NVH control and the like, the optimization of the aerodynamic performance of the automobile becomes particularly important, and the structural form, the aperture ratio, the arrangement form and the like of the front grille of the automobile serving as an important ventilation channel at the front end of the overall automobile can directly influence the airflow structure of an engine cabin, the heat exchange efficiency of a cooling system and the wind resistance coefficient of the overall automobile; Especially when the vehicle runs at a high speed, the leakage characteristics of the grille determine the trend and flow distribution of air flow, so that the fuel economy and the thermal management capability of the whole vehicle are affected, and therefore, the leakage rate of the grille at different vehicle speeds is accurately mastered, and the method has important significance for analyzing the aerodynamic performance of the whole vehicle and optimizing the structure of parts; The traditional cognition of the performance of the grating mostly depends on the wind tunnel or road test data of the whole vehicle, and independent and quantitative research on the part of the grating is difficult, but the wind tunnel experiment severely limits the research and development efficiency due to scarcity of equipment, expensive resources and long reservation period; the current testing means for the grid leakage rate in the industry mainly comprises the following modes, wherein each method has certain technical or application limitations; 1. whole vehicle wind tunnel experiment method And placing the whole vehicle in a closed wind tunnel, and indirectly analyzing the leakage behavior of the grid by measuring parameters such as the pressure distribution of the surface of the whole vehicle, the wind speed, the flow and the like in the engine compartment under the condition of constant wind speed. Although the method can provide global pneumatic information, the method is high in test cost (generally, the cost per hour is in the level of ten thousand yuan), has limited test windows, is not suitable for frequent iteration and part stage test, and is long in test period, high in assembly complexity and often delays development progress; 2. road test data acquisition method In the actual running process of the vehicle, the pressure sensor and the wind speed probe are arranged in front and behind the grille to obtain the fluid characteristics during running and calculate the leakage rate by combining the running speed, the wind direction and other environmental variables, but the method is limited by the external climate conditions, has large measurement error and poor repeatability, cannot be used for standardized and quantified tests, is limited by road conditions, safety, test time and the like, and is inconvenient to operate; 3. Simple static seal test method The method is simple to operate and low in cost, but completely breaks away from the simulation of a real air flow field and a vehicle speed, and a test result cannot guide design improvement under the actual working condition, so that the technical reference is poor; In summary, the prior art still has the following drawbacks: 1. The testing dimension is incomplete, the traditional device cannot collect pressure and flow data simultaneously on the basis of simulating the real wind speed, and the leakage rate quantitative calculation basis is lacked; 2. The environment dependence is strong, whether the test is a road test or a large wind tunnel, the test result is limited by the external environment or equipment conditions, and the test result is not suitable for independent verification under laboratory conditions; 3. The cost and efficiency contradiction are outstanding, namely, the whole wind tunnel or road test cost is high, the period is long, the iteration efficiency is low, and the requirements of rapid development and large number of sample evaluation are difficult to meet; 4. The general type platform is lacking, most of the existing testing methods are developed in a targeted manner, and a small device which is compact in structure, complete in function and simple and convenient to operate is lacking, so that the testing requirements of different grid structures can be met. Disclosure of utility model In order to solve the problems, the utility model aims to provide a wind tunnel bench. In order to solve the technical problems, the wind tunnel bench comprises a wind pipe, wherein one end of the wind pipe is fixedly provided with a conical cover, the other end of the wind pipe is fixedly provided with a p