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International Communications in Heat and Mass Transfer, 2020
Abstract The Wilson plot method has widely used to determine general heat transfer correlations, but this technique needs considerable experimental data. The Gnielinski correlation, however, simplifies the evaluation of the inside heat transfer coefficient of heating tubes only by using friction factor and hydraulic diameter. Nowadays, enhanced tubes,
Syed Muhammad Ammar, Chan Woo Park
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Abstract The Wilson plot method has widely used to determine general heat transfer correlations, but this technique needs considerable experimental data. The Gnielinski correlation, however, simplifies the evaluation of the inside heat transfer coefficient of heating tubes only by using friction factor and hydraulic diameter. Nowadays, enhanced tubes,
Syed Muhammad Ammar, Chan Woo Park
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Journal of Physics D: Applied Physics, 2007
An approximate analytical solution of the nonlinear straight fin problem is proposed. It is assumed that the heat transfer coefficient and the thermal conductivity are arbitrary functions dependent on the temperature. The approximate solution is obtained by linearizing the fin equation about an arbitrary reference temperature and then the linearized ...
Sin Kim, Cheng-Hung Huang
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An approximate analytical solution of the nonlinear straight fin problem is proposed. It is assumed that the heat transfer coefficient and the thermal conductivity are arbitrary functions dependent on the temperature. The approximate solution is obtained by linearizing the fin equation about an arbitrary reference temperature and then the linearized ...
Sin Kim, Cheng-Hung Huang
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Applied Mathematics and Mechanics, 1998
The calculation of temperature field has a great influence upon the analysis of the thermal stresses and strains during quenching, and also upon the residual stresses and microstructure of the workpiece after quenching, too. In this paper, a 42CrMo steel cylinder was taken as an investigating example.
Cheng, Heming +3 more
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The calculation of temperature field has a great influence upon the analysis of the thermal stresses and strains during quenching, and also upon the residual stresses and microstructure of the workpiece after quenching, too. In this paper, a 42CrMo steel cylinder was taken as an investigating example.
Cheng, Heming +3 more
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Volume 5C: Heat Transfer, 2016
This paper experimentally investigates the film cooling performance of an enlarged turbine guide vane with full-coverage cylindrical hole film cooling in short duration transonic wind tunnel which can model realistic engine aerodynamic conditions and adjust inlet Reynolds number and isentropic exit Mach number independently.
Zhong-yi Fu +4 more
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This paper experimentally investigates the film cooling performance of an enlarged turbine guide vane with full-coverage cylindrical hole film cooling in short duration transonic wind tunnel which can model realistic engine aerodynamic conditions and adjust inlet Reynolds number and isentropic exit Mach number independently.
Zhong-yi Fu +4 more
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Journal of Materials Processing Technology, 1999
Abstract From the TTT diagram of 45 steel, the CCT diagram was simulated by mathematical transformation, and the volume fraction of the constituents austenite, perisite, bainite and martensite in continuous cooling was calculated. The thermal physical and mechanical properties were treated as functions of the temperature and the volume fraction of ...
Cheng Heming +2 more
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Abstract From the TTT diagram of 45 steel, the CCT diagram was simulated by mathematical transformation, and the volume fraction of the constituents austenite, perisite, bainite and martensite in continuous cooling was calculated. The thermal physical and mechanical properties were treated as functions of the temperature and the volume fraction of ...
Cheng Heming +2 more
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Metals and Materials, 1999
The calculation of a temperature field has a great influence upon the analysis of thermal stresses and stains during quenching. In this paper, a 42CrMo steel cylinder was used an example for investigation. From the TTT diagram of the 42CrMo steel, the CCT diagram was simulated by mathematical transformation, and the volume fraction of phase ...
Heming Cheng +3 more
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The calculation of a temperature field has a great influence upon the analysis of thermal stresses and stains during quenching. In this paper, a 42CrMo steel cylinder was used an example for investigation. From the TTT diagram of the 42CrMo steel, the CCT diagram was simulated by mathematical transformation, and the volume fraction of phase ...
Heming Cheng +3 more
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International Journal of Heat and Mass Transfer, 2014
Abstract To obtain local flow boiling heat transfer coefficients, some studies used a linear pressure gradient method. In this study, this method is compared with a pressure gradient measurement method. The measurement was carried out for flow boiling of de-ionized water in single horizontal microchannels.
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Abstract To obtain local flow boiling heat transfer coefficients, some studies used a linear pressure gradient method. In this study, this method is compared with a pressure gradient measurement method. The measurement was carried out for flow boiling of de-ionized water in single horizontal microchannels.
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2015
In this paper, Wavelet Collocation Method has been used to solve nonlinear n problem with temperature dependent thermal conductivity and heat transfer coecient. Thermal conductivity of n materials varies any type so that we consider thermal conductivity as the general function of temperature.
Singh, Surjan, Kumar, Dinesh, N Rai, K.
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In this paper, Wavelet Collocation Method has been used to solve nonlinear n problem with temperature dependent thermal conductivity and heat transfer coecient. Thermal conductivity of n materials varies any type so that we consider thermal conductivity as the general function of temperature.
Singh, Surjan, Kumar, Dinesh, N Rai, K.
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International Communications in Heat and Mass Transfer, 2003
This investigation proposes a novel linear algebraic model (LAM) for deriving simple and accurate empirical formulas solved numerically for a complex convective flow system. A classical mixing convection problem in a uniformly heated horizontal circular tube is selected to demonstrate the validity of the linear algebraic model.
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This investigation proposes a novel linear algebraic model (LAM) for deriving simple and accurate empirical formulas solved numerically for a complex convective flow system. A classical mixing convection problem in a uniformly heated horizontal circular tube is selected to demonstrate the validity of the linear algebraic model.
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The Increasing of the Heat Transfer Coefficient of Short Linear Heat Pipes
American Journal of Modern Physics, 2023openaire +1 more source