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Method for detecting oxidation and ablation resisting performance of high-temperature material

A technology of ablation performance, high temperature material, applied in the investigation stage/state change and other directions, can solve the problem of not considering the influence of oxidation resistance ablation performance, copper pollution, only considering and so on

Active Publication Date: 2014-04-02
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the arc wind tunnel mainly completes the aerothermal test of materials at present, and there are problems such as copper pollution and difficult control of jet components. In addition, the cost of arc wind tunnel testing is very high
Oxygen-acetylene burners are also used for ablation testing of materials. This method has simple test equipment and low testing costs, but it only considers the influence of jet temperature on the anti-oxidation and ablation performance of materials (aerodynamic heat), and does not consider the airflow velocity. Effects of gas and gas composition on the oxygen ablation resistance of materials

Method used

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  • Method for detecting oxidation and ablation resisting performance of high-temperature material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Using air, N 2 , O 2 , C 3 h 8 As a gas source, the high-pressure gas source section is pressurized to 3MPa, the total gas flow rate is 10,000kg / h, the gas is heated to 1000K through the heat storage and enthalpy-increasing section, and the 1000K high-pressure gas is continuously heated in the combustion chamber, and the output temperature is 1600K The gas is passed through the cluster jet section to produce Ma=5, the temperature is 300K gas, when the gas concentration is O 2 : 5%, N 2 : 78%, CO 2 : 10% and H 2 O: In the environment of 7%, the anti-oxidation and ablation performance of the material is tested.

Embodiment 2

[0021] Using air, N 2 , O 2 , CH 4 As a gas source, pressurize to 2.5MPa in the high-pressure gas source section, the total gas flow rate is 8000kg / h, heat the gas to 1000K through the heat storage and enthalpy increasing section, and continue to heat the 1000K high-pressure gas in the combustion chamber, and the output temperature is 1600K gas, the gas passes through the cluster jet section and the effect of accompanying flow to produce Ma=5, the temperature is 400K gas, when the gas concentration is O 2 : 21%, N 2 : 50%, CO 2 : 25% and H 2 O: In the environment of 4%, the anti-oxidation and ablation performance of the material is tested.

Embodiment 3

[0023] Using air, N 2 , O 2 , H 2 As a gas source, the high-pressure gas source section is pressurized to 2MPa, the total gas flow rate is 6000kg / h, the gas is heated to 1000K through the heat storage and enthalpy-increasing section, and the 1000K high-pressure gas is continued to be heated in the combustion chamber, and the output temperature is 1600K The gas is passed through the cluster jet section and the gas with Ma=3 and the temperature of 700K is produced through the effect of enthalpy increase, when the gas concentration is O 2 : 10%, N 2 : 60%, CO 2 : 18% and H 2 O: In the environment of 12%, the anti-oxidation and ablation performance of the material is tested.

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Abstract

The invention relates to a method for detecting oxidation and ablation resisting performance of a high-temperature material. The method specifically comprises the following steps of: firstly, forming a gas source through O2, N2, air and fuel gas and pressurizing the gas source to 1-5MPa to form a high-pressure gas source, wherein fuel gas comprises CH4, C3H8 or H2, the flow rate of O2 is 1000-10000kg / h, the flow rate of CH4 is 1000-5000kg / h, the flow rate of C3H8 is 1000-5000kg / h, the flow rate of H2 is 100-3000kg / h, the flow rate of N2 is 1000-5000kg / h and the flow rate of air is 1000-90000kg / h; secondly, heating the high-pressure gas source to 1000-2500K through a heat storage chamber and a combustion chamber at a heat storage and enthalpy increase section; and finally, using the heated gas to generate a jet flow with temperature being 100-500K and mach number being 1-7 through a beaming and flow jetting section, and detecting the oxidation and ablation resisting performance of the material to be tested under conditions that the concentration percentage of O2 is 5-21 percent, the concentration percentage of N2 is 50-78 percent, the concentration percentage of CO2 is 10-30 percent and the concentration percentage of H2O is 0.1-12 percent. In combination with a combustion technique, by keeping a thin layer of high-temperature gas (500-2500K) around central high-enthalpy jet flow gas, a high-mach-number beamed jet flow with controllable jet flow temperature, compositions and speed is formed. By adopting the method, material surface oxidation and ablation tests can be conducted.

Description

technical field [0001] The invention belongs to the field of material detection and protection, and provides a method for online dynamic detection of the high-temperature oxidation resistance and ablation performance of materials by using a cluster jet technology. Background technique [0002] The anti-oxidation and ablation performance testing of materials is divided into static and dynamic testing. With the improvement of material performance testing requirements, it will be the future development direction to use dynamic testing methods to evaluate material performance. At present, the on-line dynamic detection of high temperature resistance and oxidation resistance of materials mainly relies on arc wind tunnel and oxygen-acetylene burner. Among them, the arc wind tunnel is the main detection method at present. The material to be tested is placed in the arc wind tunnel, and the high-enthalpy gas generated by the arc contacts the surface of the material to generate a shoc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/02
Inventor 朱荣孙冬柏仇永全张延玲魏鑫燕赵飞冯强阳建宏
Owner UNIV OF SCI & TECH BEIJING
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