Experimental device and method for the study of temperature field distribution characteristics under temperature-acceleration environment

Abstract

The invention discloses a test device for research of temperature field distribution characteristics under a temperature-acceleration environment. The device comprises an environmental test box, an electric heating film, a power meter, a power supply, fans, a valve, a vacuum pump, a composite vacuum gauge, a test framework, a fixation bracket, point heat sources, temperature sensors, an aviation plug, and a data acquisition and power controller. The invention also discloses a test method for research of temperature field distribution characteristics under the temperature-acceleration environment, and the method consists of the steps of: starting a centrifuge; starting the point sources; controlling conduction heating of the electric heating film; when the temperature reaches balance, regulating the pressure in an environmental test box; when balance is reached again, acquiring the temperature field distribution the environmental test box again; and turning off the equipment to end the test. Through the device and the method provided by the invention, temperature field distribution characteristics under the action of a centrifugal field and under different conditions (internal heat source characteristics, pressure level, and air flow rate) can be acquired, and the product internal temperature field distribution under multipoint heat sources can be simulated.

Description

technical field [0001] The invention relates to a test device used in a temperature-acceleration environment, in particular to a test device and a method for researching temperature field distribution characteristics in a temperature-acceleration environment. Background technique [0002] High-speed aircraft such as missiles, spaceships, space shuttles and their warheads are affected by various environmental factors such as overload acceleration and temperature during the launch and reentry stages. On the one hand, the acceleration will generate inertial force, which will make the weapons and equipment appear overweight. On the other hand, under different temperature environments, the physical performance parameters of different materials will also change, resulting in changes in the internal stress and dynamic properties of the structure. Previous studies have shown that temperature-acceleration compound environmental factors can cause more equipment reliability problems t...

AI Technical Summary

Problems solved by technology

However, in the current layout design process, the classic correlation formula of heat transfer is often used to calculate the relevant parameters. Since most of the traditional empirical formulas do not consider the influence of the centrifugal force field, the results obtained deviate greatly from the actual situation.

The interior of the warhead, such as electronic equipment, or the application of deformable materials, makes the interior of the warhead present multi-point heat sources, and it is difficult to simulate accurately for traditional modeling

Images