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High-temperature and high-pressure testing system and method used in combustion process

A combustion process, high temperature and high pressure technology, applied in the direction of radiation pyrometry, using directly heat-sensitive electric/magnetic element thermometers, measuring fluid pressure through electromagnetic elements, etc., can solve the problem of inability to completely reproduce the state of boron powder combustion pressure changes , temperature sampling data distortion, delay and other issues, to avoid test data delay, improve sampling accuracy, and improve the effect of connection mode

Pending Publication Date: 2022-03-29
SHANGHAI AEROSPACE CHEM ENG INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the fast combustion of boron powder, the time from ignition to completion of combustion is less than 60ms, the energy bursts out concentratedly, and the temperature is high. In the detection of temperature and pressure, it is usually difficult to sample the change data of boron powder combustion pressure in real time, and it is impossible to completely reproduce the combustion of boron powder. The state of pressure changes, and when the measured temperature changes suddenly, the output of the conventional thermometer will be delayed for a period of time, resulting in distortion of the temperature sampling data during the heating process

Method used

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  • High-temperature and high-pressure testing system and method used in combustion process
  • High-temperature and high-pressure testing system and method used in combustion process

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Embodiment 1

[0053] A high-temperature and high-pressure testing system used in the combustion process includes a high-pressure oxygen bomb, a cooling water tank, a temperature measuring device, a pressure measuring device, an ignition device, and a measurement and control system.

[0054] Such as figure 1 , in this embodiment, the cooling water tank adopts the external protection method of cold water in the water tank to protect the temperature of the oxygen bomb in the experiment. Immerse in cold water for combustion experiments. figure 1 , the air inlet is used to feed oxygen, and the ignition power module is the ignition device described above and below.

[0055] Such as figure 2 , in this embodiment, the method of designing the pressure induction tube on the high pressure oxygen bomb is used to extract and collect the internal pressure of the high pressure oxygen bomb. The pressure induction tube is made of stainless steel, and the pressure induction tube is immersed in the water t...

Embodiment 2

[0062] Such as image 3 , in this embodiment, the temperature measuring device adopts a tungsten-rhenium thermocouple. In order to cooperate with the thermocouple, the internal crucible support of the oxygen bomb is modified, and a stainless steel thermocouple support is added. The height of the thermocouple support is adjustable, and the thermocouple The insertion depth is 2.5-4.0cm from the bottom of the oxygen bomb. image 3 Among them, 1 and 2 are wire posts, connected to the computer acquisition board; 3 is a connecting rod, inside the high pressure oxygen bomb, and the end is connected to a thermocouple wire; 4 is a thermocouple wire.

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Abstract

The invention discloses a high-temperature and high-pressure testing system and method used in a combustion process, a high-pressure oxygen bomb is immersed in a cooling water tank, after a sample in the high-pressure oxygen bomb is combusted by an ignition device, a temperature measuring device and a pressure measuring device are respectively used for acquiring the temperature and the pressure of the sample in the combustion process; the temperature and pressure data are output to the measurement and control system; the measurement and control system is used for receiving and processing temperature and pressure data. When the temperature measuring device is an infrared thermometer, the infrared thermometer obtains the temperature of the flame center in the sample combustion process by detecting the temperature of the stand column in the crucible. The device is used for monitoring the real-time temperature and pressure in the sample combustion process to obtain the temperature-pressure change relation so as to determine the holding time of the sample at high temperature, can also be used for judging the accuracy of a combustion heat test, and is particularly suitable for combustion test when the sample is boron powder or a solid propellant. And a basic basis is provided for selecting proper combustion improver types, dosage, adding modes and the like to ensure complete combustion.

Description

technical field [0001] The invention belongs to the field of high-temperature and high-pressure testing, and in particular relates to a high-temperature and high-pressure testing system and method used in a combustion process. Background technique [0002] The combustion test conditions are affected by many factors, and the combustion state during the test is difficult to monitor. Taking boron powder as an example, the preliminary research results on the combustion of boron powder show that the following conditions must be met for sufficient combustion of boron powder: first, the ambient temperature ≥ 2000K; The time required for combustion is related to factors such as boron powder particle size and oxygen concentration. For the existing boron powder with an average particle size of 2 μm, the combustion time in an oxygen atmosphere is 5-6ms. From the current calorimetric test, it is found that the boron powder burns incompletely during the combustion of the combustion aid, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/00G01K7/02G01K1/14G01L9/00G01L19/04
CPCG01J5/0018G01K7/02G01K1/14G01L19/04G01L9/00
Inventor 王旭波詹平沈兆宏彭永飞孙伟钱建国卢国强陈静静黄洪勇周建樊荣万代红杨时敏张英杰
Owner SHANGHAI AEROSPACE CHEM ENG INST
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