Heater combustion chamber of hypersonic-speed high-enthalpy ground simulation device

Abstract

The invention discloses a heater combustion chamber of a hypersonic-speed high-enthalpy ground simulation device. The combustion chamber comprises an oxyhydrogen injection ring injection body, an inner ring air injection body, an outer ring air injection unit and a secondary mixed air injection unit. The oxyhydrogen injection ring injection body protrudes out of the air flow and is provided with oxyhydrogen injection openings which are arranged in a staggered manner, an oxyhydrogen injection ring is composed of the oxyhydrogen injection openings, most of the oxyhydrogen injection openings conduct direct spraying in the flowing direction, less of the oxyhydrogen injection openings conduct convergent injection towards the center, the oxyhydrogen injection ring is located in a center area of the combustion chamber, and an igniter is located in the center of the oxyhydrogen injection ring. The inner ring air injection body injects air to the inner wall of the oxyhydrogen injection ring; the outer ring air injection unit is located at the position away from the head of the combustion chamber by a first distance L1, and the outer ring air injection unit injects air to the outer wall of the oxyhydrogen injection ring; and the secondary mixed air injection unit is located at the position away from the head of the combustion chamber by a second distance L2 and injects air to the cylinder wall of the combustion chamber.

Description

technical field [0001] The invention belongs to the technical field of hypersonic wind tunnels, and in particular relates to a heater combustion chamber of hypersonic high-enthalpy ground simulation equipment. Background technique [0002] The development of hypersonic vehicle and engine technology greatly depends on the construction of ground wind tunnel equipment (that is, equipment for simulating high-altitude and high-speed environments on the ground such as free jets). Among them, the combustion chamber of the hypersonic high-enthalpy ground simulation equipment capable of long-term operation is an indispensable equipment. [0003] Ground-based equipment for simulating high-altitude and high-speed environments such as free jets has the characteristics of high enthalpy, high speed, high pressure, and long-term use. To simulate high-speed environments on the ground, it generally requires heating air and supplementing oxygen. The composition of oxygen is consistent with th...

AI Technical Summary

Problems solved by technology

But the problem with gas combustion is that the head design structure generally has a narrow working range, that is, it can only work within a specific range, because once it leaves this range, the flame will go out

However, the ground simulation equipment needs to simulate all the states within the envelope range, so the parameter variation range is relatively large. In the past, it was usually equipped with multiple heaters to solve the problem, and it cannot adapt to the situation where the heater parameters need to be changed when the state is continuously changed.

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