Journal ArticleDOI
An analytical study on heat transfer performance of radiators with non-uniform airflow distribution
TLDR
In this article, a generalized analytical model accounting for airflow maldistribution was developed using a finite element approach and applying appropriate heat transfer equations including the epsilon-NTU (effectiveness - number of heat transfer units) method with the Davenport correlation for the air-side heat transfer coefficient.Abstract:
Heat exchangers used in modern automobiles usually have a highly non-uniform air velocity distribution because of the complexity of the engine compartment and underhood flow fields; hence ineffective use of the core area has been noted To adequately predict the heat transfer performance in typical car radiators, a generalized analytical model accounting for airflow maldistribution was developed using a finite element approach and applying appropriate heat transfer equations including the epsilon-NTU (effectiveness - number of heat transfer units) method with the Davenport correlation for the air-side heat transfer coefficient The analytical results were verified against a set of experimental data from nine radiators tested in a wind tunnel and were found to be within +24 and - 10 per cent of the experimental results By applying the analytical model, several severe non-uniform velocity distributions were also studied It was found that the loss of radiator performance caused by airflow maldistribution, compared with uniform airflow of the same total flowrate, was relatively minor except under extreme circumstances where the non-uniformity factor was larger than 05 The relatively simple set of equations presented in this paper can be used independently in spreadsheets or in conjunction with computational fluid dynamics (CFD) analysis, enabling a full numerical prediction of aerodynamic as well as thermodynamic performance of radiators to be conducted prior to a prototype being builtread more
Citations
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Journal ArticleDOI
Heat transfer—A review of 2005 literature
Richard J Goldstein,W. E. Ibele,Suhas V. Patankar,Terrence W. Simon,Thomas H. Kuehn,Paul J Strykowski,Kumar K. Tamma,Joachim Heberlein,Jane H. Davidson,John C. Bischof,Francis A Kulacki,Uwe Kortshagen,Sean C. Garrick,Vinod Srinivasan,Kalyanjit Ghosh,Rajat Mittal +15 more
TL;DR: A review of the heat transfer literature published in 2005 can be found in this article, where the authors restrict themselves to papers published in English through a peer-review process, with selected translations from journals published in other languages.
Journal ArticleDOI
3D CFD analysis of the effect of inlet air flow maldistribution on the fluid flow and heat transfer performances of plate-fin-and-tube laminar heat exchangers
TL;DR: In this article, the authors investigated the effect of inlet air flow maldistribution on the thermo-hydraulic performance of plate fin-and-tube heat exchangers.
Journal ArticleDOI
Review of underhood aerothermal management: Towards vehicle simplified models
Mahmoud Khaled,Mahmoud Khaled,Mohamad Ramadan,Hicham El-Hage,Ahmed Elmarakbi,Fabien Harambat,Hassan Peerhossaini +6 more
TL;DR: In this article, the authors focused on the assessment of automobiles aerothermal management; namely, the consequence of the architectural arrangements of electrical and mechanical components on the aerothermal behavior in the underhood compartment.
Journal ArticleDOI
The effect of inlet conditions on the air side hydraulic resistance and flow maldistribution in industrial air heaters
TL;DR: Experimental system hydraulic resistance measurements on a scale air heater unit have highlighted the excessive hydraulic resistance of typical industry configurations Both poor header inlet conditions and large header expansion angles are shown to contribute to system hydraulic resistances 20-100% higher than suitable benchmark cases.
Dissertation
Thermal and water management of evaporatively cooled fuel cell vehicles
TL;DR: In this paper, a system level model of an evaporatively cooled fuel cell vehicle suitable for the study of water balance and heat exchanger requirements across steady state operation and transient drive cycles is presented.
References
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Journal ArticleDOI
Heat Transfer and Pressure Drop of Liquids in Tubes
E. N. Sieder,G. E. Tate +1 more
A Method of Correlating Forced Convection Heat Transfer Data and a Comparison with Fluid Friction
TL;DR: In this article, a general method for the correlation of forced convection heat transfer data is proposed, which consists in plotting, against the Reynolds number, a dimensionless group representing the experimentally measured data from which film heat-transfer coefficients would be calculated, namely, [ (t 1 − t 2 ) Δt m ] (S A), or its equivalent, h cG, multiplied by the two-thirds power of the group, (cμ k).
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