Endwall convective heat transfer for bluff bodies

Wang, Lei; Salewski, M.; Sundén, Bengt; Borg, Andreas; Abrahamsson, Hans

doi:10.1016/j.icheatmasstransfer.2011.10.006

Cited by 9 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thereby the heat transfer coefficient over the entire area can be obtained. More details of the LCT technique for obtaining the heat transfer coefficients over an entire area can be found in [10][11][12].…”

Section: Data Reductionmentioning

confidence: 99%

Experimental Study of Endwall Heat Transfer in a Linear Cascade

Wang

Sundén

Chernoray

et al. 2012

J. Phys.: Conf. Ser.

Self Cite

View full text Add to dashboard Cite

Section: Data Reductionmentioning

confidence: 99%

Experimental Study of Endwall Heat Transfer in a Linear Cascade

Wang

Sundén

Chernoray

et al. 2012

J. Phys.: Conf. Ser.

Self Cite

View full text Add to dashboard Cite

“…The 3D vortical structure produced by the obstacle greatly affects heat transfer on the endwall. Wang et al [17] investigated the endwall heat transfer characteristics of forced flow past bluff bodies using liquid crystal thermography (LCT). The results indicated that due to the formation of horseshoe vortices, the heat transfer of a single bluff body and two bluff bodies arranged in tandem were both enhanced and the power [18,19] investigated the endwall heat transfer and vortices formed upstream of an airfoil using simultaneous PIV and LCT.…”

Section: Introductionmentioning

confidence: 99%

Effects of the pocket cavity on heat transfer and fluid flow of the downstream outlet guide vane at different flow attacking angles

Liu

Hussain

Wang

et al. 2018

Numerical Heat Transfer, Part A: Applications

Self Cite

View full text Add to dashboard Cite

A pocket cavity is generated at the junction position of the low pressure turbine (LPT) and the outlet guide vane (OGV) in the rear part of a modern gas turbine jet engine. In the present study, a triangular pocket cavity is placed upstream of an OGV at different distances. The effects of the pocket cavity on heat transfer and fluid flow of the downstream OGV with different flow attack angles are investigated numerically with well validated turbulence models. The flow attack angles are varied as-30 , 0 , and þ30 at a constant Reynolds number ¼160,000. The turbulent flow details are provided by numerical calculations using two turbulence models, the unsteady DES model and the steady k-x SST model. For different flow attack angles, the high Nusselt number regions around the OGV are changed. The high heat transfer region is really drawn back at a flow attack angle ¼ þ30 (Case 2b) compared with Case 2a with a flow attack angle ¼0. As the flow attack angle is changed to-30 (Case 2c), the high Nusselt number regions are greatly enlarged not only on the suction side also on the pressure side because of the strengthened flow impingement on the vane surfaces. The pocket cavity weakens the flow impingement on the vane surfaces and the effect is more obvious when the pocket cavity is placed close to the vane. In addition, the heat transfer distribution over the pocket surface is also affected by the location of the vane. When the vane is placed close to the pocket cavity (Case 1), the heat transfer on the pocket edge is increased. In the case with a flow attack angle ¼0 , the high turbulent kinetic energy region is mainly located near the vane and wake region downstream the vane and recirculating flows can hardly be found.

show abstract

“…It was found that an existing obstacle in the flow field always increased the heat transfer relative to an isolated one. Heat transfer caused by a bluff body such as a horseshoe vortex generator was examined experimentally by Wang et al (2012). Heat transfer was enhanced by the use of the horseshoe vortex generator in both single and tandem arrangements.…”

Section: Introductionmentioning

confidence: 99%

Overall Heat Transfer Enhancement of Triangular Obstacles

Şahin¹,

Manay²,

Özceyhan³

2013

Int J Automot Mech Eng

View full text Add to dashboard Cite

In this study, the effects of equilateral triangular bodies placed in the channel on heat transfer and pressure drop characteristics were examined numerically. Reynolds number varied from 5000 to 10,000. The effects of the blockage ratio at constant edge length (B=20 mm) and Reynolds number of triangular bodies were investigated. An RNG based k-ε method was used and a constant surface temperature was applied to the bottom wall. The numerical results were presented with respect to temperature contours, local and mean Nusselt number, local and mean surface friction factor changes and heat transfer enhancement ratios. The results showed that the presence of the equilateral obstacles in the flow field enhanced the heat transfer. Temperature distributions behind the bodies were affected by the position of the triangles and the Reynolds number and changed greatly in the vertical direction along the x distance beyond the bluff bodies. The intensity of the oscillations decreased with the increase of the Reynolds number. It was observed that for all cases overall heat transfer enhancement was provided. It was found that the highest values of OHTE were reached at W/B=0 and Re=5.0 and lowest were at W/B=1 and Re=10.0.

show abstract

Endwall convective heat transfer for bluff bodies

Cited by 9 publications

References 20 publications

Experimental Study of Endwall Heat Transfer in a Linear Cascade

Experimental Study of Endwall Heat Transfer in a Linear Cascade

Effects of the pocket cavity on heat transfer and fluid flow of the downstream outlet guide vane at different flow attacking angles

Overall Heat Transfer Enhancement of Triangular Obstacles

Contact Info

Product

Resources

About