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Air heater

A technology of air heater and hydrogen, which is applied in the direction of aerodynamic test, instrument, machine/structural component test, etc. It can solve the problems of lower air flow temperature, high cost of heater, complex structure, etc.

Inactive Publication Date: 2005-09-07
INST OF MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the supersonic wind tunnel simulation experiment, the Laval nozzle is used to obtain supersonic airflow. During the expansion process of the airflow, the temperature of the airflow is greatly reduced due to the expansion. After heating, the required temperature is reached. At present, the commonly used air heater is an endothermic heater with electric heating. This kind of heater has high cost and complex structure.

Method used

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Embodiment Construction

[0018] Such as figure 1 As shown, the air heater of the present invention includes a straight cylinder 1, an air inlet disk 2 and a conical cylinder 3, and the two ends of the straight cylinder 1 are respectively connected to the air inlet disk 2 and the conical cylinder 3 through flanges.

[0019] The cylinder wall of the straight cylinder 1 is a jacketed cylinder wall. The end of the jacketed cylinder wall is provided with an air inlet 11, and the front end is provided with an air outlet 12. The jacketed cylinder wall is made of two stainless steel tubes that are nested together The two stainless steel cylinders are provided with a spiral gas passage 13 communicating with the air inlet 11 and the air outlet 12. Its structure is as follows: image 3 shown. The air at room temperature enters the spiral channel 13 from the air inlet 11 at the end of the jacketed cylinder wall, and after absorbing the heat of the cylinder wall, the high-temperature air is injected into the heat...

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Abstract

The invention discloses an air heater, which comprises a direct sleeve, an air inlet disc and a cone, the two ends of the direct sleeve connect to the air inlet disc and cone individually, the spark plug, lighting hydrogen inlet, lighting air inlet, main flow hydrogen inlet and pure oxygen inlet are fixed on the air inlet disc, the jet is fixed on the cone. In that structure, the heat from burning hydrogen can warm the testing air in the cartridge heater, the included angle of the main flow hydrogen and pure oxygen is 30 deg. which can mix the hydrogen and oxygen even and burn completely. The lighting hydrogen inlet and lighting air inlet are set on the concentric ring of the sparking plug' outside, the intersection of the two flows has a distance from the air inlet disc, which makes the sparking plug lighting easier and the air inlet disc not burning-out because of the high temperature.

Description

technical field [0001] The invention relates to an air heater for heating the test gas for simulating the M=7 supersonic test flow in the wind tunnel test of the aeroengine. Background technique [0002] In the supersonic wind tunnel simulation experiment, the Laval nozzle is used to obtain supersonic airflow. During the expansion process of the airflow, the temperature of the airflow is greatly reduced due to the expansion. After heating, the required temperature is reached. At present, the commonly used air heater is an endothermic heater using electric heating. This kind of heater has a high cost and a complicated structure. Contents of the invention [0003] The object of the present invention is to provide an air heater which uses hydrogen combustion to heat test air and can compensate for the oxygen consumed by combustion. [0004] For achieving the above object, technical solution of the present invention is: [0005] An air heater, comprising a straight cylinder,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/02G01M9/04
Inventor 俞刚李建国钱大兴李英范清玲
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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