THE USE OF PHASE-CHANGE COATINGS FOR ESTIMATING THE HEAT-TRANSFER CHARACTERISTICS IN A ROTATING-DISK SYSTEM

被引:0
作者
SAMBO, AS
机构
[1] Sokoto Energy Research Centre, Usmanu Danfodiyo University, Sokoto, 2346, PMB
关键词
PHASE-CHANGE COATINGS; ROTATING DISK; HEAT TRANSFER COEFFICIENT;
D O I
10.1002/er.4440150602
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Phase-change coatings have been applied to the axial-clearance rotor-stator cavity for the estimation of the transient heat transfer characteristics of the surface of the rotating disc. The tests were conducted for an air mass flow coefficient C(w) = 1220, a gap ratio G = 0.1, an axial-clearance ratio G(ca) = 0.05 and for rotational Reynolds numbers of Re-phi = 1 x 10(5) and 2 x 10(5). The phase-change coating used had a melting point of 38-degrees-C. From a video recording of the transient movement of the melt-line on the rotor (coated with the phase-change material) blown with heated air, it was possible to compute the heat transfer coefficients. The data reduction was made using the 'semi-infinite slab' approximation to the governing one-dimensional transient heat conduction equation.
引用
收藏
页码:425 / 429
页数:5
相关论文
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