A test method for thermal environment of slender body missile protrusions

Abstract

The invention discloses a thermal environment test method for slender missile protrusions. The thermal environment test method includes: the first step, determining working condition of the thermal environment test according to flight space and trajectory of a slender missile; the second step, calculating flow state and flow field parameter of the slender missile in flight; the third step, performing numerical simulation to the flow field of a normal scaled model on the condition of a wind tunnel; and the fourth step, scaling the missile body in high range, cutting portions of the missile body with constant flow field parameter to obtain a new model according to the flow field parameter of different portions of the missile body calculated in the second step and the third step, and utilizing the new model to substitute for the model in the third step to complete test. Test results of protrusions and interference zones thereof, which are obtained by the thermal environment test method, can represent the thermal environment relation of the original missile protrusions and interference zones thereof. By applying the test data obtained by the method to the design of missile thermal protection, the method is effective as proved by missile flight tests.

Description

technical field [0001] The invention relates to the technical field of slender body missile testing. More specifically, it relates to a test method for the thermal environment of a slender body missile protrusion. Background technique [0002] When the missile passes through the atmosphere at hypersonic speed, the aerodynamic heating of the surface of the missile body is harsh. Accurately estimating the thermal environment parameters of the missile and providing input conditions for the missile heat protection design has become a necessary guarantee for the successful development of high-speed missiles. How to accurately measure the thermal environment parameters of missiles, especially protrusions and their interference areas, in ground wind tunnel tests, use the results of wind tunnel tests to analyze the distribution of aerodynamic and thermal environments under high-speed missile flight conditions, check and analyze models and improve calculation methods , providing the...

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Problems solved by technology

[0005] At present, the domestic thermal environment test of protrusions adopts the method of partially enlarging the size of protrusions. Although this method can meet the needs of point layout and multiple measurement points, this method destroys the relative size relationship between protrusions and projectiles, and the results measured in the test cannot Representing the thermal-environmental relationship of the original shape

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