Thermal protection method for launch pad

Abstract

The invention discloses a thermal protection method for a launch pad. The thermal protection method is characterized in that water spray main channels are arranged on components of the launch pad, water nozzles are formed in the various water spray main channels, cooling water sources are connected with the various water spray main channels, cooling water is sprayed out of the various water nozzles after a rocket is ignited, is sprayed on flame of a nozzle of an engine of the rocket and is preliminarily mixed with high-temperature gas flow sprayed out of the nozzle of the engine to form cooling water mist, and momentum and heat are exchanged between the high-temperature and high-speed gas flow and water flow sprayed out of the water nozzles in the procedure, so that the temperature of the gas flow sprayed on the launch pad can be reduced. The thermal protection method has the advantages that the intensity of ablation of the gas spray flow to launch equipment in a rocket launch procedure can be effectively reduced, and the cost is low.

Description

technical field [0001] The invention relates to a cooling method, in particular to a heat protection method for a launch pad. Background technique [0002] During the maneuvering launch of weapons, the high-temperature, high-speed, and highly condensed-phase gas flow will firstly ablate the launch pad, especially the flow guide device of the launch pad. The ablation and damage effect of the gas flow on the launch pad is mainly through the high-speed, high-temperature air flow that quickly transmits a large flow of heat into the launch pad structure, and the heat flux density transmitted from the surface of the launch pad structure to the interior reaches tens of megawatts per unit area or even above As a result, the key structures of the launch pad will heat up rapidly and the structural strength will be greatly reduced. How to thermally protect the key structures of the launch pad and avoid serious damage to the launch pad structure or even collapse has become a concern of ...

AI Technical Summary

Problems solved by technology

[0003] At present, the thermal protection technology adopted by the launch pad is mainly based on two directions. One is to adopt a reasonable flow diversion method to avoid or reduce the influence of the launch pad and rocket launch vehicle support structure from the exhaust gas flow. Currently, optimized double-sided and single-sided The diversion surface, in the launching position where the range of gas exhaust is strictly limited for mobile launch, these optimized double-sided and single-sided diversion surfaces cannot meet the requirements of use; the second is to use reasonable thermal protection materials, and use thermal protection materials to resist high The ablation damage effect of hot gas flow delays the transfer process of high heat flow to the launch platform structure. Now the main use is adiabatic composite materials or coatings, but adiabatic composite materials or coatings have limited anti-ablation life and their repairability It has also become a big problem in the maintenance work of the launch pad

[0004] The above thermal protection methods are all passive thermal protection, resulting in many problems such as poor manufacturability of the launch pad, uncontrollable cost, and inconvenient maintenance.

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