Testing system employing hollow-brick-based heat-accumulating-type heating

Abstract

The invention discloses a testing system employing hollow-brick-based heat-accumulating-type heating, and work is divided into four phases. Fuel gas preheating phase: the high temperature fuel gas generated by a methane (or natural gas ) and air burner flows through a heat storage array from top to bottom to store heat in the heat storage array in a relative low rate, the requirements of predetermined initial temperature distribution can be satisfied, then the fuel gas is exhausted through an air outlet; supercharging phase: the burner is stopped, an outlet high temperature valve is closed, ahigh pressure air inlet valve is opened, test high pressure air is filled into a heater through a gas source, slow supercharging is slowly performed on the heater in a controllable rate until a required stagnation pressure condition is realizing; test running phase: the air passes through a heat storage body of the heater from bottom to top, convection heat exchange is generated by air-flow and the heat storage body to obtain heating, and the air-flow horizontally flows out of the heater in the temperature approaching to the temperature of an outlet end of the heat storage body. End phase: after the test is finished, a primary air gas circuit is closed firstly, corresponding blowing is performed, a high temperature rapid valve is closed, and a preparing phase of the next test is started orthe experiment is finished after natural cooling.

Description

technical field [0001] The invention relates to the technical field of scramjet ground experiments, in particular to a regenerative heater, a preheating burner, a gas distribution and pipeline system, an ultra-high temperature fast valve, a cooling water system and a measurement and control system. Background technique [0002] So far, the most practical and commonly used continuous energy addition methods mainly include arc heating, combustion heating, resistance heating, and regenerative heating. Among them, arc heating and combustion heating will produce pollution, so that the physical characteristics of the test working fluid are not completely equal to air. Resistance heating and regenerative heating methods produce pure test air, but limited by conventional resistance heating elements, it is difficult for resistance heating methods to break through the simulation capability of flight Mach number above 5.0. At present, the regenerative heater is the best solution to ob...

AI Technical Summary

Problems solved by technology

Only the Aerospace 701 Research Institute in China has a test system based on an alumina pebble bed regenerative heater, but its simulated temperature does not exceed 1000K, and the dust particles are seriously polluted

At present, there is no test system for hollow brick heat storage heating in hypersonic wind tunnels in China

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