Blowing system and blowing method of air heating device

Abstract

The invention relates to a blowing system and a blowing method for an air heating device, which solves the problem that the existing heating device is prone to deflagration or explosion hazard, and tempering of a combustion chamber when shutting down will cause the ablation of nozzle surface or the nozzle of the heating device. The system comprises a gas cylinder, a liquid oxygen flowing path start-blowing unit, an alcohol flowing path start-blowing unit, an alcohol flowing path shutdown-blowing unit, and a liquid oxygen flowing path shutdown-blowing unit. The inlets of the liquid oxygen flowing path start-blowing unit, the alcohol flowing path start-blowing unit, the alcohol flowing path shutdown-blowing unit, and the liquid oxygen flowing path shutdown-blowing unit are all connected withthe outlet of the gas cylinder. The outlets of the liquid oxygen flowing path start-blowing unit are connected with the outlet of the liquid oxygen supply line, and the outlet of the alcohol flowingpath start-blowing unit is connected with the outlet of the alcohol supply line. The outlets of the alcohol flowing path shutdown-blowing unit and the liquid oxygen flowing path shutdown-blowing unitare connected with the air heating device.

Description

technical field [0001] The invention relates to the field of ramjet testing, in particular to a blowing system and a blowing method of an air heating device, in particular to a blowing system and method for weakly blowing at start-up and strong blowing at shutdown of an air heating device in a ground test of a ramjet engine. Background technique [0002] For ground tests of ramjet engines at different flight altitudes and different Mach numbers, the air heating device uses liquid oxygen and alcohol to burn and heat the air to meet the static temperature, static pressure and other air flow requirements of ramjet engines in real flight conditions. [0003] At present, when the heating device is ignited and started, the working fluid passing into the combustion chamber is accumulated in an instant, and the energy is too concentrated at the moment of starting. When the ignition device works normally, it is prone to the risk of deflagration or explosion. When the engine medium su...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing heating device is prone to deflagration or explosion danger when it is working, and the backfire of the combustion chamber when it is shut down causes the injector surface or nozzle of the heating device to be ablated, and provides a blowing system for the air heating device

Images