Graphite heater, design method and used graphite heating component

Abstract

The invention provides a graphite heater, a design method and a used graphite heating component. The graphite heater comprises n graphite heating component layers, wherein n is more than or equal to 1, each graphite heating component layer is of an axisymmetric enclosed structure formed by arranging a plurality of triangular graphite heating components in a circumferential direction, bottom edgesof the graphite heating component forming each graphite heating component layer form a regular polygon, the edge lengths of the regular polygon are consistent, external circles of each regular polygonare parallel and coaxial, an upper surface of the graphite heating component of a (i+1)th layer and a bottom surface of the regular polygon of the graphite heating component layer of the i(th) layerare copular and are same in shape, and i is equal to 1, 2 until n. In the graphite heater provided by the invention, the specifications and the numbers of the required heating components are greatly reduced, the characteristic that a plane is decided by three points of a triangle is utilized, and the profiling and radiation heating effect is better; and moreover, under unit area, the appearance size of the triangle is relatively large, and mechanical connection is more convenient.

Description

technical field [0001] The invention belongs to the technical field of aircraft structural heat test, relates to a graphite heater, a design method and a graphite heating element used, in particular to a graphite heater, a design method and a graphite heater used for a test piece of a rotating body or similar to a rotating body Graphite heating elements used. Background technique [0002] As the Mach number of the aircraft is getting higher and higher, the corresponding aerodynamic heating problem is becoming more and more serious. The local maximum temperature is above 1400°C, and the instantaneous heat flux can reach 1.2MW / m 2 Above, this puts forward higher technical requirements for the thermal test of the traditional ground environment structure. [0003] In the case that the heating temperature of the traditional quartz lamp can only reach 1200 ℃ ~ 1300 ℃, graphite is more used as the radiation heating element in the structural thermal test because of its high heating...

AI Technical Summary

Problems solved by technology

When the heated test piece is a conventional square or circular shape, the graphite heater composed of rod-shaped graphite heating elements can achieve a good radiation heating effect; but when the test piece is a rotating body or a structure similar to a rotating body, such as a cone Shaped structure, this kind of rod-shaped graphite heater will not only result in a large number of required components, long production and processing cycle, and high cost, but also the mechanical connection space at both ends of the element is small, the operation is cumbersome, and the installation process is prone to breakage

Images