Experimental analysis of heat transfer between a heated wire and a rarefied gas in an annular gap with high diameter ratio

被引：7

作者：

Chalabi, H. ^{[1
]}

Buchina, O. ^{[2
]}

Saraceno, L. ^{[3
]}

Lorenzini, M. ^{[1
]}

Valougeorgis, D. ^{[2
]}

Morini, G. L. ^{[1
]}

机构：

[1] Univ Bologna, DIENCA, Bologna, Italy

[2] Univ Thessaly, Dept Mech Engn, Volos, Greece

[3] ITFD Casaccia, ENEA, Rome, Italy

来源：

1ST EUROPEAN CONFERENCE ON GAS MICRO FLOWS (GASMEMS 2012) | 2012年 / 362卷

关键词：

D O I：

10.1088/1742-6596/362/1/012028

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this paper a first experimental attempt is performed to measure heat conduction through rarefied air at rest contained between two concentric cylinders. The heat transfer between a heated platinum wire having a diameter (d) of 0.15 mm, disposed along the axis of a cylindrical shell in stainless steel having an inner diameter (D) of 100 mm, and a surrounded rarefied gas has been studied experimentally and numerically. The ratio between the outer and inner diameter of the annular region filled by the gas is large (D/d=667). In the annular region filled with air the pressure was varied by using a vacuum pump from atmospheric value down to 10(-3) mbar. Temperature differences between the wire and the external stainless steel wall in the range 50-125 K were imposed and the heat power transferred from the wire to the surround was measured as a function of the gas pressure starting from air at atmospheric conditions down to 10(-3) mbar. The experimental results obtained in these tests were compared with the numerical results obtained by using the linear and nonlinear Shakhov kinetic models.

引用

页数：10

共 12 条

[1]

[Anonymous], 1968, Fluid Dyn

[2]

Bergman TheodoreL., 2007, Introduction to Heat Transfer, V6Th

[3] HEAT LOSS FROM VERY THIN HEATED WIRES IN RAREFIED GASES [J].