An ultra-high temperature and large temperature difference water spray cooling device

Abstract

The invention discloses a large-temperature-difference water spray cooling device capable of bearing an ultra-high temperature and relates to the field of ground thermal protection / prevention of aircrafts. The large-temperature-difference water spray cooling device comprises a gas inlet, a first water distribution pipe layer, a second water distribution pipe layer, a high-temperature-resistant barrel and a gas outlet, wherein the gas inlet and the gas outlet are formed in two ends of the high-temperature-resistant barrel respectively; the first water distribution pipe layer is arranged in the position closer to the gas inlet; the second water distribution pipe layer is arranged in the position farther from the gas inlet. The large-temperature-difference water spray cooling device capable of bearing the ultra-high temperature is designed for the first time in China, can work for a long time in an extreme environment at the temperature of 3,600 K, and has the capacity of cooling high-temperature gas to 700 K within 40 milliseconds, wherein the flow of the high-temperature gas is as high as 0.38 million cubic meters per hour. With development of the large-temperature-difference water spray cooling device capable of bearing the ultra-high temperature, construction of a large combustion gas flow test device is possible, and an effective test means is provided for development of a novel aerospace craft.

Description

technical field [0001] The invention relates to the field of aircraft ground heat insulation, in particular to an ultra-high temperature and large temperature difference water spray cooling device. Background technique [0002] With the development of aerospace technology, the types of spacecraft began to gradually diversify. Emerging spacecraft represented by hypersonic vehicles flying in the atmosphere (such as the US HTV2), scramjet vehicles (such as the US X-51), and aerospace aircraft (such as the US X-37B) all have the ability to fly at high speeds in the atmosphere. characteristics. The maximum speed of these new aircraft may exceed 20 times the speed of sound. Flying at such a speed for a long time in the atmosphere will cause very serious aerodynamic heating, so higher requirements are placed on thermal protection technology. [0003] In this context, thermal protection technology has made great progress, and thermal protection test technology, as an important as...

AI Technical Summary

Problems solved by technology

The disadvantages of this type of device are: 1) The temperature of the medium does not exceed 1000K; 2) Most of them are vertical structures, and the height can be made very high, so the ratio of height to diameter is basically not restricted by site factors, and there is enough space for the medium. Among them, it flows for a long time, so that the spray water can be fully mixed with the medium, but this design cannot adapt to the occasion where the device must be horizontal and the field length is very long; Medium flow time is longer, there is sufficient time to cool down

Once the medium flow becomes large, the traditional design becomes difficult to adapt

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