Resistive heater used for engine combustion chamber experiment system

Abstract

The invention discloses a resistive heater used for an engine combustion chamber experiment system. The resistive heater is used for simulating the high temperature, high pressure and high Mach number in supersonic speed and hypersonic speed flying states and the oxygen component in gas and performing experiment research, free of pollution to experiment working media, on hypersonic speed combustion chamber performance so that related problems caused by incoming flow pollution can be evaluated. According to the resistive heater, thin-wall tube heating bodies serving as heating elements are made of high-temperature-resistive alloy steel, an inner barrel and the thin-wall tube heating bodies are fixed inside a heater shell, and the thin-wall tube heating bodies, the inner barrel and the heater shell together form a heating gas duct. When voltage of 380 V is loaded on the thin-wall tube heating bodies, the thin-wall tube heating bodies emit heat, cold air which is heated flows inside and outside through thin-wall tubes for forced-convection heat exchanging, and the outlet temperature can reach 1000 K. The experiment can be performed inside supersonic speed and hypersonic speed air tunnels very close to actual flying conditions. The resistive heater is simple in structure, long in stable operation time and low in operation cost and works continuously.

Description

technical field [0001] The invention relates to the technical field of engine experiments, in particular to a resistance heater used in an engine combustion chamber experiment system. Background technique [0002] In the existing published technical literature, most of the heaters used in the combustor direct-connected experimental system use combustion heaters. The experimental gas has the problem of pollution, and the experimental results cannot be directly used to evaluate the engine performance under actual flight conditions. According to public literature reports, typical resistance heating test systems currently used in scramjet test research mainly include the following types: [0003] The Russian Central Fluid Research Institute (TASGI) designed a regenerative resistance heater system with a total temperature of 1200K, with a single power of 75kW, but the structure is complex and the price is high. [0004] The scramjet combustor experimental equipment developed by ...

AI Technical Summary

Problems solved by technology

The heater is bulky, the length of the heater is 6.3m, the structure is complex, and the operating cost is high

[0005] The resistance heaters developed by China Aerodynamics Research and Development Center, Beijing Institute of Aerodynamics, and Nanjing University of Aeronautics and Astronautics have a limited range of simulated flight Mach numbers, and the outlet temperature of the resistance heaters has not reached 1000K, and the operating costs are also high.

Images