CN-115639246-B - Heterogeneous rocket kerosene steam cloud explosion experimental device and method in simulated oxygen-enriched atmosphere

CN115639246BCN 115639246 BCN115639246 BCN 115639246BCN-115639246-B

Abstract

The invention discloses a heterogeneous rocket kerosene steam cloud explosion experimental device and method in an simulated oxygen-enriched atmosphere, wherein the experimental device comprises a simulated oxygen-enriched atmosphere tank, an air supply system, a heating temperature control system, a multi-channel electric ignition system, a data test acquisition system and an exhaust system, wherein the air supply system is sequentially connected with an external oxygen cylinder, an air flowmeter and a one-way valve to the oxygen-enriched atmosphere tank, a silicon rubber electric heating plate in the heating temperature control system is fixed on the inner wall of the oxygen-enriched atmosphere tank, an oil pool heater is fixed at the bottom of the oxygen-enriched atmosphere tank, the multi-channel electric ignition system comprises an adjustable igniter and an ignition electrode, a hydrocarbon sensor in the data test acquisition system, a first oxygen sensor extend to an outside multi-channel data acquisition module, a transmission module and a computer, and the exhaust system is respectively connected with a second oxygen sensor and a vacuum pump. According to the invention, the non-uniform concentration field distribution formed by heating, evaporating and diffusing rocket kerosene in an oxygen-enriched atmosphere under actual environmental conditions is simulated, and the steam cloud explosion characteristics are tested, so that the reliability is good and the practicability is strong.

Inventors

BO BING
YAN ZHENG
LU SHOUXIANG
ZHU LIANGPING
YAO WENBIN
YE XIN
YANG ZEHUA
Weng Yingjian

Assignees

中国科学技术大学
中国人民解放军63796部队

Dates

Publication Date: 20260512
Application Date: 20220909

Claims (5)

1. The non-uniform rocket kerosene vapor cloud explosion experimental device in the simulated oxygen-enriched atmosphere is characterized by comprising a simulated oxygen-enriched atmosphere tank (1), an air supply system, a heating temperature control system, a multi-path electric ignition system, a data test acquisition system and an exhaust system; The simulated oxygen-enriched atmosphere tank (1) is of a sealed cylindrical structure, a pressure relief valve (8) is fixedly arranged on the simulated oxygen-enriched atmosphere tank (1), the simulated oxygen-enriched atmosphere tank (1) is a pressure-resistant tank and can bear the gas pressure of 1MPa, and two observation windows (16) and six through holes are arranged on the side wall of the simulated oxygen-enriched atmosphere tank; The air supply system comprises a one-way valve (21), an air flowmeter (22) and an external oxygen cylinder (23), wherein the external oxygen cylinder (23) is sequentially connected with the one-way valve (21), the air flowmeter (22) and the simulated oxygen-enriched atmosphere tank (1), and the oxygen-enriched atmospheres with different concentrations are simulated in an air inlet purging mode; The heating temperature control system comprises a silicon rubber electric heating plate (31), a constant temperature controller (32), a fixed bracket (33) and an oil pool heater (34), wherein the silicon rubber electric heating plate (31) is fixed on the inner wall of the simulated oxygen-enriched atmosphere tank (1), the constant temperature controller (32) is connected with the oil pool heater (34), and the oil pool heater (34) is fixed at the center of the bottom of the simulated oxygen-enriched atmosphere tank (1) through the fixed bracket (33); The multi-path electric ignition system comprises an adjustable igniter (41) and an ignition electrode (42), wherein the adjustable igniter (41) is connected with the ignition electrode (42), and the multi-path ignition electrode (42) is arranged in the simulated oxygen-enriched atmosphere tank (1) through the gantry type linear module (9) and the adjustable positioning bracket and positioned at different heights right above the center of the oil pool heater (34); The data test acquisition system comprises a hydrocarbon sensor (51), a first oxygen sensor (52), a multi-channel data acquisition module (53), a transmission module (54) and a pressure transmitter (7), wherein the pressure transmitter (7) adopts an explosion-proof pressure transmission controller and can dynamically change pressure when reaching a millisecond level, an ignition electrode (42) is connected with the multi-channel data acquisition module (53), the hydrocarbon sensor (51) and the first oxygen sensor (52) are arranged in an analog oxygen-enriched atmosphere tank (1), the hydrocarbon sensor (51) and the first oxygen sensor (52) are fixed at different heights above an oil pool heater (34) through a positioning bracket, oxygen and kerosene vapor cloud concentrations far away from different heights of a liquid rocket kerosene level can be effectively monitored, the pressure transmitter (7) is fixed on the side wall of the analog oxygen-enriched atmosphere tank (1), the hydrocarbon sensor (51) and the first oxygen sensor (52) are respectively connected with the multi-channel data acquisition module (53), and the multi-channel data acquisition module (53) is connected with the transmission module (54); The exhaust system comprises a three-way valve (61), a second oxygen sensor (62) and a vacuum pump (63), wherein the vacuum pump (63) is sequentially connected with the three-way valve (61), the second oxygen sensor (62) and the simulated oxygen-enriched atmosphere tank (1), and the second oxygen sensor (62) is used for testing the oxygen concentration in the simulated oxygen-enriched atmosphere tank (1); the constant temperature controller (32) is arranged outside the simulated oxygen-enriched atmosphere tank (1), and the fixed bracket (33) and the oil pool heater (34) are arranged inside the simulated oxygen-enriched atmosphere tank (1); the adjustable igniter (41) is arranged outside the simulated oxygen-enriched atmosphere tank (1); The multichannel data acquisition module (53) and the transmission module (54) are arranged outside the simulated oxygen-enriched atmosphere tank (1).
2. The experimental device for simulating heterogeneous rocket kerosene vapor cloud explosion in the oxygen-enriched atmosphere according to claim 1 is characterized in that a gantry type linear module (9) is installed in the simulated oxygen-enriched atmosphere tank (1), and the ignition electrode (42), the hydrocarbon sensor (51) and the first oxygen sensor (52) are all fixed on the gantry type linear module (9).
3. The experimental device for simulating heterogeneous rocket kerosene vapor cloud explosion in the oxygen-enriched atmosphere is characterized in that the gantry type linear module (9) comprises a gantry type linear module support (91), a gantry type linear module stepping motor (92) and a connecting orifice plate (93), the gantry type linear module support (91) comprises a screw rod (94) and positioning supports, the positioning supports are fixed on the screw rod (94) through the connecting orifice plate (93), a hydrocarbon sensor (51) and a first oxygen sensor (52) are arranged on each positioning support, an ignition electrode (42) is arranged at one end of each positioning support, and the gantry type linear module stepping motor (92) is installed on the screw rod (94).
4. The experimental device for simulating heterogeneous rocket kerosene vapor cloud explosion in an oxygen-enriched atmosphere according to claim 1, wherein a plurality of temperature feedback thermocouples are respectively fixed on the center of the bottom of the oil pool heater and the silicon rubber electric heating plate (31) at different heights above the oil pool heater (34).
5. A simulated oxygen-enriched atmosphere heterogeneous rocket kerosene vapor cloud explosion experimental method is characterized by comprising the steps of checking air tightness, closing a one-way valve (21) switch of an air supply system, opening a vacuum pump (63) of an exhaust system, monitoring the numerical value of a pressure transmitter (7) to a preset value, closing the vacuum pump (63), opening the air supply system and an external oxygen cylinder (23), introducing oxygen with preset concentration into a simulated oxygen-enriched atmosphere tank (1) through air intake blowing, ensuring the oxygen atmosphere concentration in the simulated oxygen-enriched atmosphere tank (1) through a second oxygen sensor (62) in an exhaust pipeline, closing the external oxygen cylinder (23) after the oxygen concentration and the pressure reach the preset value, controlling an oil pool heater (34) and a silicon rubber electric heating plate (31) through a constant temperature controller (32), monitoring the numerical value change of a non-uniform concentration field detected by a hydrocarbon sensor (51) and a first oxygen sensor (52), determining the equivalent ratio of oxygen and kerosene, repeating the ignition step by using an ignition linear igniter (9) after the ignition is completed, and repeating the ignition step (41) until the experiment is completed.

Description

Heterogeneous rocket kerosene steam cloud explosion experimental device and method in simulated oxygen-enriched atmosphere Technical Field The invention relates to the technical field of combustible liquid explosion testing devices, in particular to a device and a method for simulating heterogeneous rocket kerosene steam cloud explosion in an oxygen-enriched atmosphere. Background In various accident risks of a space-flight launching field, the fire explosion caused by propellant leakage is the most serious disastrous accident, so that the further control of the risk of the ignition explosion of the leaked propellant on the basis of actively preventing the propellant leakage is a vital technical link for influencing the launching safety of a high-thrust rocket. Rocket kerosene is a fuel which is easy to leak, has high combustion heat value and high risk, is easy to leak in the transportation, storage and use processes, and can form a combustible steam cloud with a non-uniform concentration field in a certain space, and the rocket kerosene is easier to cause explosion accidents once encountering a fire source in air or high-concentration oxygen atmosphere (hereinafter referred to as "oxygen-enriched atmosphere"), so that the research on the explosion characteristics of the rocket kerosene steam cloud in the oxygen-enriched atmosphere has important significance for preventing the explosion accidents of the rocket kerosene steam cloud. At present, a combustible fuel explosion characteristic test system is rarely researched at home and abroad, more combustible gas or dust explosion and explosion suppression characteristics are researched, and a normal-temperature and normal-pressure test experiment is generally carried out in a long and narrow pipeline or a cylindrical and spherical experimental device with a certain volume (below 100L), so that the difference between the test experiment and the actual environment is large, the obtained experimental result has no obvious significance on guiding the explosion research in a large space, and the actual existing combustible steam cloud explosion process of a non-uniform concentration field cannot be truly simulated. Therefore, in order to study the explosion characteristics of combustible fuel vapor, especially to test the vapor cloud explosion characteristics of a non-uniform concentration field formed by heating, evaporating and diffusing rocket kerosene in an oxygen-enriched atmosphere, the invention needs to provide a non-uniform rocket kerosene vapor cloud explosion experimental device capable of simulating the oxygen-enriched atmosphere. Disclosure of Invention The invention aims to solve the technical problem of providing a device and a method for simulating heterogeneous rocket kerosene steam cloud explosion experiment in an oxygen-enriched atmosphere. The technical problem is solved by the following technical means that the experimental device for simulating heterogeneous rocket kerosene vapor cloud explosion in the oxygen-enriched atmosphere comprises a simulated oxygen-enriched atmosphere tank, a heating temperature control system, an air supply system, a multi-channel electric ignition system, a data test acquisition system and an exhaust system. The simulated oxygen-enriched atmosphere tank is a 100L cylindrical pressure-resistant tank capable of bearing gas pressure of 1MPa, two observation windows and six through holes are formed in the side wall of the simulated oxygen-enriched atmosphere tank, and the through holes are respectively communicated with a pressure release valve, a pipeline of a gas supply system, a heating temperature control system pipeline, an exhaust pipeline, a data acquisition system pipeline and a pressure transmitter. In particular to a heterogeneous rocket kerosene steam cloud explosion experimental device in simulated oxygen-enriched atmosphere, which comprises a simulated oxygen-enriched atmosphere tank (1), an air supply system, a heating temperature control system, a multi-path electric ignition system, a data test acquisition system and an exhaust system, The simulated oxygen-enriched atmosphere tank (1) is of a sealed cylindrical structure, and the side wall of the simulated oxygen-enriched atmosphere tank comprises an observation window (16); The air supply system comprises a one-way valve (21), an air flowmeter (22) and an external oxygen cylinder (23), wherein the external oxygen cylinder (23) is sequentially connected with the one-way valve (21), the air flowmeter (22) and the simulated oxygen-enriched atmosphere tank (1); The heating temperature control system comprises a silicon rubber electric heating plate (31), a constant temperature controller (32), a fixed bracket (33) and an oil pool heater (34), wherein the silicon rubber electric heating plate (31) is fixed on the inner wall of the simulated oxygen-enriched atmosphere tank (1), the constant temperature controller (32) is connected with the oil pool heater (3