Aerodynamic heat flow measuring device and method for plume field of engine in vacuum chamber

Abstract

The invention discloses an aerodynamic heat flow measuring device and method for the plume field of an engine in a vacuum chamber. A support is fixedly mounted on an installation platform of a four-axis movement mechanism, the rear end of a heat flow sensor penetrates the rear side of the support, the heat flow sensor is sleeved with an insulated end cover, and an insulation sleeve is arranged between the heat flow sensor and the support. A signal line of the heat flow sensor is placed in a signal line protective piece, and connected to a signal converter by penetrating the front side surface of the support and then lead to a signal collector outside the vacuum chamber via a chamber-through flange. Voltage signals measured by the heat flow sensor are converted into current signals via the signal converter, and then collected by the signal collector, heat flow values are obtained by conversion according to the coefficient of the hot flow sensor, and thus, the aerodynamic heat flow of the plume field of the engine in the vacuum chamber is obtained. The method and device have the advantages that a three-dimensional movement device is cooperated, total-flow-field measurement is realized, and the problem that interference among sensors influences the flow-field form and further leads to inaccurate measurement is completely solved.

Description

technical field [0001] The invention relates to the field of mechanical design and aerodynamics, specifically, a set of aerodynamic heat flow measurement device and method for engine plume field in a vacuum cabin, which is applicable to vacuum plume field under all ground conditions. Background technique [0002] The attitude and orbit control engine is the power device on the spacecraft, and it is the core component necessary for the spacecraft to realize the functions of position maintenance, attitude control and orbit transfer. The plume-like flow field formed by the jet flow generated by the engine when it expands to the external vacuum environment is called the vacuum plume. The vacuum plume will have an aerodynamic thermal effect on the spacecraft, causing the surface temperature of the spacecraft to rise and the material to be damaged. Or some components will be damaged, which will reduce the performance of the working components, or lead to the failure of the flight ...

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Problems solved by technology

[0007] In order to solve the problem that it is difficult to measure the aerodynamic heat of the vacuum plume field, the present invention proposes a set of measurement device and method for the aerodynamic heat flow of the engine plume field in the vacuum cabin, which can effectively solve the above problems and realize the large-scale, accurate measurement

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