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Laser ignition combustion chamber for titanium fire test

A technology of laser ignition and combustion chamber, applied in the application field of titanium alloys, can solve the problems such as the inability to meet the development needs of advanced engines, and achieve the effects of reducing power, compact structure and low cost

Active Publication Date: 2018-05-08
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to technical blockade and other reasons, my country's titanium fire test technology research is still in its infancy, and existing combustion chambers or devices cannot meet the needs of advanced engine development

Method used

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  • Laser ignition combustion chamber for titanium fire test
  • Laser ignition combustion chamber for titanium fire test
  • Laser ignition combustion chamber for titanium fire test

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] like figure 1 , 2 As shown in , 3, the shell (1) has a circular cross-section and is made by integral casting. Tables (101), (102), (103) have diameters of 200mm, 120mm and 80mm, respectively. The boss (101) installs the sample holder (6), which is pressed onto the boss (101) by two pressure plates, and the test sample is clamped to the sample holder (6) by the inner and outer splints (601) (602). The observation window (9) is made of quartz glass with a diameter of 88mm. It is fixed to the boss (102) of the observation window by a cover plate with holes through bolts. When the equipment is running, a high-speed camera can be installed directly above the observation window to observe the samples in the cavity. situation, or install an infrared temperature sensor to measure the sample temperature. The laser incident window (10) is located in front of the observation window (9), is made of zinc selenide, and has a diameter of 32mm. The body axis is at an angle of 45°,...

Embodiment 2

[0052] The shell (1) has a rectangular cross-sectional shape and is welded by four plates with cooling channels (104), and the three bosses (101), (102), and (103) are connected to the shell (1) by welding On the upper side, the boss (102) and the boss (103) are arranged on the upward side, the opening (101) is arranged on the side, so that the observation window (9) on the opening (102) is located directly above the test sample, and the opening (103 The laser incident window (10) on the ) is located at the oblique top of the test sample, the material of the observation window (9) is quartz glass, the material of the laser incident window (10) is zinc selenide, the observation window (9) and the laser incident window (10) There is a sealing ring between the opening of the casing and the casing to prevent the leakage of high temperature and high pressure gas. The opening (103) is arranged obliquely so that the laser beam incident perpendicular to the laser incident window (10) ...

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Abstract

The invention belongs to the technical field of application of titanium alloy and relates to a laser ignition combustion chamber for titanium fire test. The combustion chamber mainly comprises a housing, a front cover, a rear cover, a gas inlet pipe, an exhaust pipe, a sample clamp, a pressing plate, a cooling water pipe, an observation window, a laser incidence window, a gas temperature sensor, agas pressure sensor and the like; moreover, a test sample can be ignited within a short time through a laser ignition mode; the pressure intensity, the temperature and the gas flow speed of a cavityare adjusted simultaneously by the gas inlet pipe which seals the combustion chamber and is close to the test sample; the observation window is positioned over the sample, so that the combustion condition can be observed conveniently; a cooling structure is arranged in the wall of the housing, so that the titanium fire test with the temperature of 600 DEG C or more can be realized; and the sampleclamp is tightly pressed and fixed by the pressing plate, so the mounting is facilitated. The combustion chamber provided by the invention is compact in structure and low in use cost, can bear the gasflow conditions of high temperature, high pressure and high speed, can meet the requirement of simulating the titanium fire test under the interaction of the aero-engine service environment, and hasa wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy application and relates to a laser ignition combustion chamber for a titanium fire test. Background technique [0002] Titanium alloys have a safety hazard of burning in the high-temperature, high-pressure and high-speed airflow environment of aero-engines, resulting in titanium fire failures. In addition to more than 100 titanium fires in the United States and Russia, several titanium fires have also occurred during the development of advanced engines in my country in recent years. The problem of titanium alloy combustion has attracted great attention. [0003] The titanium fire test is the core and key to scientifically evaluate the combustion characteristics of titanium alloys in the engine service environment. External energy such as high-energy friction, laser and liquid droplets can be used as ignition sources. Among them, laser is a safe, reliable and clean new ignition technology, ...

Claims

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Application Information

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IPC IPC(8): G01N31/12
CPCG01N31/12
Inventor 弭光宝陈航
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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