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Test method for simulating high temperature water-laden gas flow in combustion chamber

A test method and combustion chamber technology, which can be used in measurement devices, instruments, scientific instruments, etc.

Active Publication Date: 2016-11-30
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the gas components provided by the gas wind tunnel contain water vapor, the upper limit of the total temperature that can be simulated is about 2000K, which cannot meet the high temperature (above 2000K) conditions inside the engine combustion chamber.

Method used

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  • Test method for simulating high temperature water-laden gas flow in combustion chamber
  • Test method for simulating high temperature water-laden gas flow in combustion chamber
  • Test method for simulating high temperature water-laden gas flow in combustion chamber

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Embodiment Construction

[0023] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0024] Such as figure 1 As shown, the test equipment for simulating the high-temperature water-containing airflow in the combustion chamber includes an arc heater 1, a mixing plenum 2, and a test nozzle 3. The arc heater 1, the mixing plenum 2, and the test nozzle 3 are hermetically connected to each other. The arc heater 1 can be a tubular arc heater, a segmented arc heater, or a stacked arc heater. The mixing plenum 2 can choose mixing plenums with different axial lengths according to needs. The test nozzle 3 also can select the test nozzles of different shapes or lengths as required.

[0025] Such as figure 2 As shown, a water inlet 4 is arranged on the chamber wall upstream of the mixing plenum 2, and an even number (2n) of the water inlets 4 are evenly arranged on the chamber wall in a radially opposite manner. Liquid water is injected into the inside of the c...

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Abstract

The invention provides a test method for simulating a high-temperature water-containing airflow in a combustion chamber, which uses test equipment to generate a method for simulating a high-temperature water-containing airflow above 2000K in a combustion chamber. flow into the mixing plenum; use the water inlet to spray a certain mass flow rate of normal temperature liquid water into the mixing plenum in a manner of equal mass in the radial direction; when the normal temperature liquid water encounters high temperature air, It absorbs heat and vaporizes, and fully mixes with high-temperature air to form an airflow of high-temperature water-containing components, and the airflow enters the test nozzle. The method of the invention can generate high-temperature (above 2000K) water-containing gas flow, which can be applied to the aerothermal ground test of the research on the ablation resistance performance and ablation mechanism of the engine combustion chamber heat-proof material.

Description

technical field [0001] The invention relates to an aerodynamic thermal ground test method for simulating high-temperature water-containing airflow in a combustion chamber. Background technique [0002] The thermal protection technology of engine combustion chamber is one of the key technologies of scramjet engine. C / C, C / SiC and ultra-high temperature ceramics (UHTC) and other carbon-based and ceramic-based composite materials and other ultra-high temperature heat-resistant materials, with their good high-temperature chemical and physical properties, are obtained in the thermal protection system of the engine combustion chamber. more widely used. Material surface oxidation ablation and mechanical erosion are the main manifestations of ablation or even destruction of heat-resistant materials in engine combustion chambers. [0003] After the combustion reaction of hydrocarbon fuel, the gas components inside the combustion chamber are mainly combustion product carbon dioxide ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/00
Inventor 涂建强陈连忠彭锦龙杨忠凯
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS