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Indexed by:期刊论文

Date of Publication:2009-07-01

Journal:JOURNAL OF THERMAL SCIENCE

Included Journals:SCIE、EI、Scopus

Volume:18

Issue:3

Page Number:246-252

ISSN No.:1003-2169

Key Words:thermal separator; oscillating tube; pressure wave; numerical simulation

Abstract:The wall temperature distribution and heat transfer process of the oscillating tube have been investigated in this paper using both numerical simulation and experimental method. The wall temperature of oscillating tube increases rapidly in the inlet and then decreases slowly, moreover, the rally phenomenon of wall temperature near the closed end is observed. With the increase of jet flow frequency, the highest wall temperature increases and the location of that moves towards the inlet. The velocity of pressure wave in the oscillating tube almost remains constant even its intensity changes. The quantity of heat transfer between the gas and inner wall of the oscillating tube determines the wall temperature of every location, and the pressure wave disturbance can cause the heat transfer quantity change. Each pressure wave has its own disturbance range. The wall temperature distribution can be explained by the change of pressure wave intensity and its disturbance time. Besides, the step and rally of wall temperature are discussed, which shows that the conditions of heat transfer can be improved due to intersection or reflection of pressure waves.