국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	EXPERIMENTAL AND NUMERICAL CHARACTERIZATION OF A STEADY-STATE CYLINDRICAL BLACKBODY CAVITY AT 1100 DEGREES CELSIUS
저자	Thomas J. Horn and Amanie N. Abdelmessih
Keyword	Blackbody calibration furnace; Heat flux calibration; Heat transfer; Numerical thermal analysis; Temperature measurement
URL	http://www.dfrc.nasa.gov/DTRS/2000/PDF/H-2403.pdf
보고서번호	NASA-TM-2000-209022
발행년도	2000
출처	NASA Dryden Flight Research Center
ABSTRACT	A blackbody calibration furnace at the NASA Dryden Flight Research Center is used to calibrate heat flux gages. These gages are for measuring the aerodynamic heat flux on hypersonic flight vehicle surfaces. The blackbody is a graphite tube with a midplane partition which divides the tube into two compartments (dual cavities). Electrical resistance heating is used to heat the graphite tube. This heating and the boundary conditions imposed on the graphite tube result in temperature gradients along the walls of the blackbody cavity. This paper describes measurements made during steady-state operation and development of finite-difference thermal models of the blockbody furnace at 1100 뷖. Two configurations were studied, one with the blackbody outer surface insulated and the other without insulation. The dominant modes of heat transfer were identified for each configuration and the effect of variations in material properties and electric current that was passed through the blackbody were quantified.