Flow boiling critical heat flux experimental device under super-gravity

Abstract

The invention discloses a flow boiling critical heat flux experimental device under super-gravity, which is mainly used for measuring the critical heat flux density of flow boiling under the super-gravity. The flow boiling critical heat flux experimental device under the super-gravity comprises a fluid circulation module, a critical heat flux measurement module and a super-gravity simulation platform; and the fluid circulation module is fixed on the super-gravity simulation platform. Super-gravity of different sizes and directions is realized by adjusting a motor frequency and an arrangement form of experimental pipes. The experimental pipe is heated through a direct energization manner, the system pressure is regulated by a heater in a liquid storage tank, and the flow rate is regulated by a pump. During the experiment, when the pressure, flow, dryness or temperature reaches set values, the heating power of the experimental pipe is slowly increased until the CHF is reached; and then the super-gravity is increased and the experiment is repeated. The invention realizes the accurate measurement of the flow boiling CHF under the super-gravity, and obtains the CHF and the correspondingtemperature in different super-gravity sizes and directions, which can be used for exploring the occurrence mechanism of the CHF under the super-gravity.

Description

technical field [0001] The invention relates to the technical field of aircraft environment control, relates to problems such as phase change heat and drying up, and in particular relates to a flow boiling critical heat flow experimental device under supergravity. Background technique [0002] With the increasing heat load of modern high-performance fighter electronic equipment, traditional air circulation refrigeration technology can no longer meet the cooling needs of electronic equipment. As a phase change heat transfer technology, flow boiling is an effective way to solve this problem. Because many maneuvering flights of fighter jets are under supergravity, for example, the normal flight overload of the fourth-generation aircraft is 9g, and the normal flight overload of future hypersonic aircraft can reach 15g, which puts forward the demand for flow boiling technology under supergravity. Critical heat flux (CHF) is an important issue in flow boiling. When the critical ...

AI Technical Summary

Problems solved by technology

When the critical heat flow phenomenon occurs, the heat transfer deteriorates sharply, which in turn causes the wall temperature to rise rapidly and even burn out

an increase in temperature also means a decrease in the reliability of electronic equipment, which is very detrimental to the effectiveness and safety of the fighter

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