scholarly journals Experimentally Studied Recovery Factor and Heat Transfer Augmentation with Supersonic Flow on a Flat Wall Behind the Edge

2016 ◽  
Vol 16 (11) ◽  
Author(s):  
Yu Vinogradov ◽  
S Popovich ◽  
M Strongin
Keyword(s):  
Heat Transfer ◽  
Supersonic Flow ◽  
Recovery Factor ◽  
Flat Wall ◽  
Heat Transfer Augmentation

Experimental study of thermohydraulic characteristics and irreversibility analysis of novel axial corrugated tube with spring tape inserts

2020 ◽  
Vol 92 (3) ◽  
pp. 30901
Author(s):  
Suvanjan Bhattacharyya ◽  
Debraj Sarkar ◽  
Ulavathi Shettar Mahabaleshwar ◽  
Manoj K. Soni ◽  
M. Mohanraj
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Thermal Performance ◽  
Working Fluid ◽  
The Novel ◽  
Heat Exchanger Tube ◽  
Heat Transfer Augmentation ◽  
Corrugated Tube ◽  
The Impact ◽  
Exchanger Tube

The current study experimentally investigates the heat transfer augmentation on the novel axial corrugated heat exchanger tube in which the spring tape is introduced. Air (Pr = 0.707) is used as a working fluid. In order to augment the thermohydraulic performance, a corrugated tube with inserts is offered. The experimental study is further extended by varying the important parameters like spring ratio (y = 1.5, 2.0, 2.5) and Reynolds number (Re = 10 000–52 000). The angular pitch between the two neighboring corrugations and the angle of the corrugation is kept constant through the experiments at β = 1200 and α = 600 respectively, while two different corrugations heights (h) are analyzed. While increasing the corrugation height and decreasing the spring ratio, the impact of the swirling effect improves the thermal performance of the system. The maximum thermal performance is obtained when the corrugation height is h = 0.2 and spring ratio y = 1.5. Eventually, correlations for predicting friction factor (f) and Nusselt number (Nu) are developed.

EXPERIMENTAL INVESTIGATION ON HEAT TRANSFER AUGMENTATION IN HORIZONTAL TUBE USING COILED WIRE INSERTS

2019 ◽  
Vol 26 (5) ◽  
pp. 513-534
Author(s):  
Madhu Sruthi Emani ◽  
Abhik Nayak ◽  
Achin Kumar Chowdhuri ◽  
Bijan Kumar Mandal ◽  
Sujoy Kumar Saha
Keyword(s):  
Heat Transfer ◽  
Experimental Investigation ◽  
Horizontal Tube ◽  
Heat Transfer Augmentation

Heat transfer at the nose of a blunt body in a rarefied supersonic flow of a nitrogen-hydrogen mixture

1975 ◽  
Vol 14 (6) ◽  
pp. 809-812 ◽  
Author(s):  
A. A. Bochkarev ◽  
V. A. Kosinov ◽  
V. G. Prikhod'ko ◽  
A. K. Rebrov
Keyword(s):  
Heat Transfer ◽  
Supersonic Flow ◽  
Blunt Body ◽  
Hydrogen Mixture

Effect of heat transfer augmentation on two-phase flow instabilities in a vertical boiling channel

1983 ◽  
Vol 17 (3) ◽  
pp. 161-169 ◽  
Author(s):  
A. Mentes ◽  
O. T. Yildirim ◽  
H. Gürgenci ◽  
S. Kakaç ◽  
T. N. Veziro¯glu
Keyword(s):  
Heat Transfer ◽  
Two Phase Flow ◽  
Flow Instabilities ◽  
Phase Flow ◽  
Two Phase ◽  
Heat Transfer Augmentation

scholarly journals Heat Transfer From Low Aspect Ratio Pin Fins

2007 ◽  
Author(s):  
Michael E. Lyall ◽  
Alan A. Thrift ◽  
Atul Kohli ◽  
Karen A. Thole
Keyword(s):  
Heat Transfer ◽  
Aspect Ratio ◽  
Gas Turbines ◽  
Channel Height ◽  
Internal Cooling ◽  
Number Range ◽  
Pin Fin ◽  
Heat Transfer Augmentation ◽  
Low Aspect Ratio ◽  
Pin Fins

The performance of many engineering devices from power electronics to gas turbines is limited by thermal management. Heat transfer augmentation in internal flows is commonly achieved through the use of pin fins, which increase both surface area and turbulence. The present research is focused on internal cooling of turbine airfoils using a single row of circular pin fins that is oriented perpendicular to the flow. Low aspect ratio pin fins were studied whereby the channel height to pin diameter was unity. A number of spanwise spacings were investigated for a Reynolds number range between 5000 to 30,000. Both pressure drop and spatially-resolved heat transfer measurements were taken. The heat transfer measurements were made on the endwall of the pin fin array using infrared thermography and on the pin surface using discrete thermocouples. The results show that the heat transfer augmentation relative to open channel flow is the highest for smallest spanwise spacings and lowest Reynolds numbers. The results also indicate that the pin fin heat transfer is higher than the endwall heat transfer.

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