A numerically-based parametric study of heat transfer off an inclined surface subject to impinging airflow

Rasipuram, Srinivasan C.; Nasr, Karim

doi:10.1016/j.ijheatmasstransfer.2004.06.030

Cited by 11 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Decreasing the angle of incidence reduced the average heat transfer. Rasipuram and Nasr [6] studied air jet issuing out of defroster's nozzles and impinging on inclined windshield of a vehicle. The overall heat transfer coefficient of the inclined surface for the configuration with one rectangular opening was found to be 16% more than that for the configuration with two rectangular openings.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer in a channel with inclined target surface cooled by single array of centered impinging jets

Shaahid

Al-Hadhramic

2013

Therm sci

View full text Add to dashboard Cite

An experimental investigation has been carried out to study the heat transfer characteristics in a channel with heated target plate inclined at an angle cooled by single array of equally spaced centered impinging jets for jet Reynolds numbers, Re = = 9300, 14400, and 18800. Air ejected from an array of orifices impinges on the heated target surface. The target plate forms the leading edge of a gas turbine blade cooled by jet impingement technique. The work includes the effect of jet Reynolds numbers and feed channel aspect ratios (H/d = 5, 7, and 9 where H = 2.5, 3.5, and 4.5 cm, and d = 0.5 cm) on the heat transfer characteristics for a given orifice jet plate configuration with equally spaced centered holes with outflow exiting in both directions (with inclined heated target surface). In general, It has been observed that, H/d = 9 gives the maximum heat transfer over the entire length of the target surface as compared to all feed channel aspect ratios. H/d = 9 gives 3% more heat transfer from the target surface as compared to H/d = 5 (for Re = 14400). Also, it has been observed that the magnitude of the averaged local Nusselt number increases with an increase in the jet Reynolds number for all the feed channel aspect ratios studied.

show abstract

Section: Introductionmentioning

confidence: 99%

Heat transfer in a channel with inclined target surface cooled by single array of centered impinging jets

Shaahid

Al-Hadhramic

2013

Therm sci

View full text Add to dashboard Cite

show abstract

“…Unfortunately, there would be impacts on the HVAC system performance caused by these changes, even without changing the HVAC compressor. Therefore, automotive engineers would like to know the modified HVAC performance before it was manufactured [1][2] [3]. However, transient CFD simulation, considering cabin temperature distribution or phase changing, needs a lot of computational resources and time.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Design and Numerical Simulation Analysis of a Passenger Car’s Defrosting Duct

Yang

Huang

Ren

2013

AMM

View full text Add to dashboard Cite

Aerodynamic design of airflow duct has become an important issue of the automobile Heating, Ventilation and Air Conditioning (HVAC) system. In this research, the HVAC defrosting airflow duct of a passenger car was designed using Computational Fluid Dynamics (CFD) method. The HVAC defrosting outlets’ sizes and positions were considered as design variables. The mass flow rate distribution and the cabin flow structure were considered as design targets. The steady Reynolds Averaged Navier-Stokes (RANS) method was adopted because it is an efficient way to help select possible good designs in the early stage of new product development without time consuming and huge computational cost of the unsteady methods. Various duct design configurations were evaluated by analyzing the defrosting mass flow distribution of each flow outlet and by visualizing the flow structure near the windshield and the front left side window. The CFD results showed that the total area of the outlets near the rain wipers was a decisive parameter for mass flow distribution in this duct design. The defrosting flow structure near side windows were difficult to be improved only by enlarging the area of the outlet. The effective flow structure was realized by choosing proper angles of the vanes skirt of the outlets to defrost the windshield region. The overall performance of HVAC system, such as defrosting time and cabin temperature distribution, could not only be predicted based on the results of the steady RANS method. It was shown that the important parameters including the mass flow distribution of each outlets and the flow structure near the windshield and side windows could be quickly evaluated from the steady state CFD simulation results in the early design stage.

show abstract

Implementation of Hydro-thermal Coupling Model of Windshield Defrosting System in OpenFOAM

Li,

Xu,

Zhao

et al. 2024

Advances in Mechanical Design

View full text Add to dashboard Cite

A numerically-based parametric study of heat transfer off an inclined surface subject to impinging airflow

Cited by 11 publications

References 13 publications

Heat transfer in a channel with inclined target surface cooled by single array of centered impinging jets

Heat transfer in a channel with inclined target surface cooled by single array of centered impinging jets

Aerodynamic Design and Numerical Simulation Analysis of a Passenger Car’s Defrosting Duct

Implementation of Hydro-thermal Coupling Model of Windshield Defrosting System in OpenFOAM

Contact Info

Product

Resources

About