Fluid flow and convective heat transfer of combined swirling and straight impinging jet arrays

Wannassi, Manel; Monnoyer, F.

doi:10.1016/j.applthermaleng.2014.12.043

Cited by 40 publications

(13 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The identified dimensionless parameter y + , defined as in Eqs. (12) to (14), is the dimensionless distance from the wall for turbulent flows.…”

Section: Mesh Analysismentioning

confidence: 99%

“…Since too much bleeding air from the engine will reduce the thrust seriously, the method of enlarging the diameters of the jets holes in the anti-icing system of aircraft to improve the heat transfer efficiency is not appropriate. (13) and (14), with H/d=10 and d=2 mm. It can be found that the jet 2 peak value of Nu number at S/d=20 is larger than the other cases.…”

Section: Effect Of the Diameter Of The Holementioning

confidence: 99%

“…Furthermore, the studies of Ianiro and Cardone [13] and Wannassi and Monnoyer [14] showed that the fountain flow intensity of multi-jet impingement depends on the swirl angle obtained by swirling nozzles with helical inserts. In addition, introducing the swirl motion could improve the mixing characteristics via a broadening of the impingement region rather than heat transfer rates caused by the rapid decrease of the swirl intensity in the axial direction.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental and numerical investigation of heat transfer in an array of impingement jets on a concave surface

Yang

Chang

et al. 2017

Applied Thermal Engineering

View full text Add to dashboard Cite

In this article, a combined experimental and computational study was conducted to investigate the heat transfer characteristics of sonic impingement jets on the concave surface of the leading edge of a NACA0015 airfoil. Both the local/average Nusselt number (Nu / Nu) distributions and flow pattern in the impingement region were obtained for H/d ranging from 10 to 25, S/d from 20 to 35, and d from 2 to 5 mm, and the jet inclination angle (θ) varied from 0° to 30°. The suitability of eight different turbulence models were investigated and verified. Streamlines and velocity distributions around the stagnation point were also obtained by numerical calculation. Comparison between the numerical work and the experimental results indicated that (1) both Nu and Nu were enhanced with H/d=10, S/d=30, and θ=15° in the current study. The impinging multi-jet heat transfer capacity could be augmented if the appropriate structure variables are determined, and (2) enlarging the diameters of the jets holes (d) could not significantly improve the heat transfer performance in the anti-icing system of aircraft.

show abstract

“…The identified dimensionless parameter y + , defined as in Eqs. (12) to (14), is the dimensionless distance from the wall for turbulent flows.…”

Section: Mesh Analysismentioning

confidence: 99%

Section: Effect Of the Diameter Of The Holementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental and numerical investigation of heat transfer in an array of impingement jets on a concave surface

Yang

Chang

et al. 2017

Applied Thermal Engineering

View full text Add to dashboard Cite

show abstract

“…The results elaborated that flow characteristics and heat transfer rate are mainly affected by nozzle‐to‐plate spacing and swirl number. Wannassi and Monnoyer implemented an experimental investigation on flow and heat transfer properties of conventional and swirl impingement jets with different swirl angles (20°, 30°, 45°) and constant nozzle to plate spacing ( H / D = 4). Their investigation stated that the stronger effect of jet impingement occurred due to the secondary flow generated with the presence of the vortex generator.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of heat transfer of impingement system with swap swirl generator

Salman

2019

Heat Trans. Asian Res.

View full text Add to dashboard Cite

This article presents the computational fluid dynamic simulation of the heat transfer characteristics induced by a swap swirl air-jet generator on the impingement surface. The study was carried out for conventional and swap twist tape inserts of twisted ratio y = 2.93 with various swap angles (α = 30°, 60°, 90°) at a constant distance of nozzle diameter impingement plate (L = 2D). The results show that the Nusselt number of the swirl impingement air-jet depends on the twisted tape swap angles and airflow rate. The results also showed that the swap angle of 90°gave notable uniform local heat transfer distribution compared with the typical twist tape and other swap twist tapes (α = 30°, 60°). In addition, the predicted results of the local heat transfer coefficient help explain the local turbulence intensity and generation to assist the industrial applications of swirl impingement air-cooling jet.

show abstract

“…However, the effect of swirl in a multi jet cooling has not been investigated extensively except the works done by Wannassi and Monnoyer (2015), Nuntadusit et al (2012). Wannassi and Monnoyer have investigated flow pattern and heat transfer rate for multi jet cooling with a combination of nozzle with and without swirl.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Analysis of Flat Plate Subjected to Multi-Jet Air Impingement using Principal Component Analysis and Computational Technique

Chandramohan¹,

Murugesan²,

Arivazhagan³

2017

JAFM

View full text Add to dashboard Cite

show abstract

Fluid flow and convective heat transfer of combined swirling and straight impinging jet arrays

Cited by 40 publications

References 19 publications

Experimental and numerical investigation of heat transfer in an array of impingement jets on a concave surface

Experimental and numerical investigation of heat transfer in an array of impingement jets on a concave surface

Characteristics of heat transfer of impingement system with swap swirl generator

Heat Transfer Analysis of Flat Plate Subjected to Multi-Jet Air Impingement using Principal Component Analysis and Computational Technique

Contact Info

Product

Resources

About