B. Liu and X. S. Wang (2014) Flame radiant heat flux measurement based on bi-material cantilever. Journal/International Journal Of Thermal Sciences 79 60-66. [In English]
Web link: http://dx.doi.org/10.1016/j.ijthermalsci.2013.12.015
Keywords: Radiant heat flux; Measurement method; Bi-material micro-cantilever; Position sensitive device (PSD); Thermal conduction; ATOMIC-FORCE MICROSCOPE; SURFACE STRESS; MICROCANTILEVER; SENSORS; OPTIMIZATION; DETECTORS; CAMERA

Abstract: A novel method for flame radiant heat flux measurement based on bi-material micro-cantilever is developed. The theoretical analysis and optimization of the bi-material micro-cantilever, such as its shape, size and thickness ratio are discussed. The relationship between the thermal radiation and the deflection of the micro-cantilever is determined by the calibration tests with a standard blackbody. Radiant heat flux of practical flame is measured with this method and compared with the Captec total radiant flux sensor (Captec TS-30, France). The results show that the bi-material micro-cantilever made of silicon nitride and aluminum achieves its biggest sensitive coefficient when the thickness ratio is 3/2, and the suitable temperature rising scope of a commercially available triangular micro-cantilever is determined experimentally. The 200 gm bi-material micro-cantilever has higher sensitivity and stability when the radiant heat flux within the range of 450 W/m(2) < q < 2300 W/m2. (C) 2014 Elsevier Masson SAS. All rights reserved.