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h 2 o 2 Accurate prediction method of catalytic bed igniter performance

A H2O2, igniter technology, applied in the measurement of color/spectral properties, chemical analysis using catalysis, jet engine testing, etc. The effect of easy structure, high sensitivity and low cost

Active Publication Date: 2021-08-31
INST OF MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, thermocouples usually measure at a single point and lack spatial resolution. In addition, their time response is low, and the discrimination of the degree of chemical reaction is not enough. In addition, this contact measurement method will interfere with the flow field. In summary, it is difficult to achieve H by traditional methods. 2 o 2 Accurate Evaluation of Catalytic Bed Igniter Performance

Method used

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  • h <sub>2</sub> o <sub>2</sub> Accurate prediction method of catalytic bed igniter performance
  • h <sub>2</sub> o <sub>2</sub> Accurate prediction method of catalytic bed igniter performance
  • h <sub>2</sub> o <sub>2</sub> Accurate prediction method of catalytic bed igniter performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Take the H of this laboratory 2 o 2 catalytic bed igniter as an example, such as figure 1 As shown, a H 2 o 2 Catalytic bed igniter performance accurate prediction system, including: igniter measurement and control system 1, catalytic bed igniter 2, silver screen 3, injector 4, TDLAS signal modulation and data processing module 5, laser 6, one-to-two optical fiber 7, Collimating lens b8, laser receiving end 9, photodetector 10, Fabry-Perot interferometer 11, data processing terminal 12, and collimating lens a13.

[0044] The igniter measurement and control system 1 passes H 2 o 2 The delivery pipeline is connected to the catalytic bed igniter 2, and the interior of the catalytic bed igniter 2 is arranged with a multi-layer silver mesh 3, and an injector 4 is installed at the tail, and the TDLAS signal modulation and data processing module 5 is connected to the laser 6, The laser 6 is connected to the one-to-two optical fiber 7, the one-to-two optical fiber 7 is re...

Embodiment 2

[0053] On the basis of Example 1, different from Example 1, a H 2 o 2 The method for accurately predicting the performance of a catalytic bed igniter specifically includes the following steps:

[0054] (a) Solid-liquid engine ignition: igniter measurement and control system 1 controls H 2 o 2 Enter catalytic bed igniter 2, H 2 o 2 After catalytic decomposition by silver mesh 3, H is generated 2 O, O 2 High-temperature mixed gas, the high-temperature mixed gas is sprayed out through the injector 4 to realize the ignition of the solid-liquid engine;

[0055] (b) Obtain spectral information: TDLAS signal modulation and data processing module 5 allows laser 6 to output a given scanning frequency and wavelength laser signal through current modulation and temperature modulation; the output laser signal is divided into optical path 1 and Optical path 2 two paths;

[0056] b1. Calibration signal measurement of optical path 1: optical path 1 is collimated through collimating le...

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Abstract

The invention belongs to the technical field of solid-liquid hybrid rocket engine ignition, and the invention relates to a H 2 o 2 A method for accurately predicting the performance of a catalytic bed igniter, the method comprising the following steps: obtaining the H of the gas flow at the outlet of the igniter based on laser absorption spectroscopy 2 The O molecule absorbs the spectral information, and calculates the gas flow temperature at the outlet of the igniter and the H 2 O molecular concentration, by analyzing gas flow information such as temperature rise curve, H 2 O molecular concentration changes, etc., quantitative analysis of H 2 o 2 Through the decomposition efficiency of the catalytic bed, the H 2 o 2 Quantitative evaluation of catalytic bed ignition performance. The present invention adopts for H 2 o 2 Accurate evaluation of the degree of catalytic decomposition reaction and prediction of its ignition performance are different from existing contact measurement methods such as thermocouples and pressure sensors, and have the advantages of high sensitivity, high time response, and non-contact measurement. In addition, the present invention is more Simple, low cost, and less dependent on the environment, it can be used as a H 2 o 2 Conventional means for performance evaluation of catalytic bed igniters.

Description

technical field [0001] The invention belongs to the technical field of solid-liquid hybrid rocket engine ignition, and specifically relates to a H 2 o 2 A method and implementation scheme for accurately predicting the performance of a catalytic bed igniter. Background technique [0002] In the development of aerospace, power comes first. The rocket engine is the heart of the rocket and the core support for the development of human spaceflight. As an important development direction of current rocket propulsion technology, solid-liquid hybrid rocket engine has broad application prospects based on its unique structural characteristics. Solid-liquid hybrid rocket motor combines the structural characteristics of solid motor and liquid motor, and stores fuel and oxidant in different phases separately. Among them, the solid-liquid hybrid rocket motor with the combination of solid fuel and gas / liquid oxidant is the most widely studied. This special structure makes it have the adv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M15/14G01N21/39G01N31/10
CPCG01M15/14G01N21/39G01N31/10
Inventor 林鑫王泽众李飞余西龙魏祥庚
Owner INST OF MECHANICS CHINESE ACAD OF SCI