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W. D. Morris

Bio: W. D. Morris is an academic researcher from University of Hull. The author has contributed to research in topics: Critical heat flux & Heat transfer coefficient. The author has an hindex of 1, co-authored 1 publications receiving 14 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper, it is demonstrated that rotation about a parallel axis enhances the forced convection heat transfer, and a correlating equation for assessing this effect is proposed, and the results have application for the assessment of heat transfer in certain gas-cooled electrical machine rotors.
Abstract: An investigation of turbulent heat transfer in a revolving square-sectioned tube is reported in this paper. It is demonstrated that rotation about a parallel axis enhances the customary forced convection heat transfer, and a correlating equation for assessing this effect is proposed. The range of parameters covered in the experiments permit the results to have application for the assessment of heat transfer in certain gas-cooled electrical machine rotors.

15 citations


Cited by
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Journal ArticleDOI
Kitae Jang1, Sangkwon Jeong1
TL;DR: In this article, the effect of motion of the orbiting scroll on the convective heat transfer in the scroll wraps was investigated and quantitatively analyzed and applied to the simulation of compression process in scroll compressor.
Abstract: This paper describes an experimental study on the convective heat transfer inside the scroll compressor. An experimental refrigeration system is composed with extensive instrumentations in the compressor that is operated at variable speeds. The 13 thermocouples installed inside the compressor monitor the temperatures of the scroll wrap during compression process of refrigerant. The temperature and the pressure of refrigerant at suction, and the pressure at discharge ports are measured, and applied to the numerical simulation as the operating condition parameters. The temperature measured at the discharge port is used to verify the simulation result with relevant heat transfer coefficient. This paper describes the effect of motion of the orbiting scroll on the convective heat transfer in the scroll wraps. Separate experiments are performed to investigate the heat transfer in such a peculiar physical condition. With this experimental result, the effect of the oscillation of the wall on the heat transfer is quantitatively analyzed and applied to the simulation of compression process in scroll compressor. The whole consecutive compression processes in the scroll compressor is simulated in detail by solving equations of mass and energy balance for the refrigerant. The modified heat transfer coefficient correlation considering the effect of motion of the orbiting scroll predicts the discharge temperature better than other typical heat transfer coefficients.

60 citations

Journal ArticleDOI
TL;DR: In this article, the combined heat transfer of convection and radiation in rectangular ducts rotating in a parallel mode was investigated numerically in detail, and the coupled momentum and energy equations were solved by the DuFort-Frankel numerical scheme to examine the interactions of the convection with radiation.

23 citations

Journal ArticleDOI
TL;DR: In this article, rotation-induced secondary flow and mixed convection heat transfer in the entrance region of rectangular ducts rotating about a parallel axis are investigated. And the authors show that the rotational effect in an iso-flux duct is more significant than that in an isothermal flux, while the effect vanishes in isothermal ducts.

21 citations

Proceedings ArticleDOI
01 Jan 1989
TL;DR: A generalized one-dimensional computer code for analyzing the flow and heat transfer in the turbomachinery cooling passages was developed in this paper, which is capable of handling rotating cooling passages with turbulators, 180 degree turns, pin fins, finned passages, bypass flows, tip cap impingement flows, and flow branching.
Abstract: A generalized one-dimensional computer code for analyzing the flow and heat transfer in the turbomachinery cooling passages was developed. This code is capable of handling rotating cooling passages with turbulators, 180 degree turns, pin fins, finned passages, by-pass flows, tip cap impingement flows, and flow branching. The code is an extension of a one-dimensional code developed by P. Meitner. In the subject code, correlations for both heat transfer coefficient and pressure loss computations were developed to model each of the above mentioned type of coolant passages. The code has the capability of independently computing the friction factor and heat transfer coefficient on each side of a rectangular passage. Either the mass flow at the inlet to the channel or the exit plane pressure can be specified. For a specified inlet total temperature, inlet total pressure, and exit static pressure, the code computers the flow rates through the main branch and the subbranches, flow through tip cap for impingement cooling, in addition to computing the coolant pressure, temperature, and heat transfer coefficient distribution in each coolant flow branch. Predictions from the subject code for both nonrotating and rotating passages agree well with experimental data. The code was used to analyze the cooling passage of a research cooled radial rotor.

16 citations