Numerical and experimental study of a supersonic separated turbulent flow and local heat transfer in a flat channel with sudden expansion

2013 ◽  
Vol 13 (09) ◽  
Author(s):  
Valeri Nosatov ◽  
Pavel Semenev
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Turbulent Flow ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Sudden Expansion ◽  
Flat Channel

Local Heat Transfer Measurements in Turbulent Flow Around a 180-deg Pipe Bend

1987 ◽  
Vol 109 (1) ◽  
pp. 43-48 ◽  
Author(s):  
J. W. Baughn ◽  
H. Iacovides ◽  
D. C. Jackson ◽  
B. E. Launder
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Turbulent Flow ◽  
Transfer Coefficient ◽  
Secondary Flow ◽  
Local Heat Transfer ◽  
Reynolds Numbers ◽  
Local Heat ◽  
Pipe Bend ◽  
Streamline Curvature

The paper reports extensive connective heat transfer data for turbulent flow of air around a U-bend with a ratio of bend radius:pipe diameter of 3.375:1. Experiments cover Reynolds numbers from 2 × 104 to 1.1 × 105. Measurements of local heat transfer coefficient are made at six stations and at five circumferential positions at each station. At Re = 6 × 104 a detailed mapping of the temperature field within the air is made at the same stations. The experiment duplicates the flow configuration for which Azzola and Humphrey [3] have recently reported laser-Doppler measurements of the mean and turbulent velocity field. The measurements show a strong augmentation of heat transfer coefficient on the outside of the bend and relatively low levels on the inside associated with the combined effects of secondary flow and the amplification/suppression of turbulent mixing by streamline curvature. The peak level of Nu occurs halfway around the bend at which position the heat transfer coefficient on the outside is about three times that on the inside. Another feature of interest is that a strongly nonuniform Nu persists six diameters downstream of the bend even though secondary flow and streamline curvature are negligible there. At the entry to the bend there are signs of partial laminarization on the inside of the bend, an effect that is more pronounced at lower Reynolds numbers.

Numerical Investigation of Heat Transfer for Laminar and Turbulent Flow in a Plate Heat Exchanger

2010 ◽  
Author(s):  
Iulian Gherasim ◽  
Nicolas Galanis ◽  
Cong Tam Nguyen
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Turbulent Flow ◽  
Complex Geometry ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Plate Heat Exchanger ◽  
Plate Heat ◽  
Laminar And Turbulent Flow ◽  
Channel Plate

The problem of turbulent flow and heat transfer in a two-channel plate heat exchanger was numerically investigated, considering its complex geometry as well as inlet and outlet ports effects. Results obtained for the flow and thermal field have clearly shown their asymmetrical behavior, which has important influence on the local heat transfer. Friction factor are found to be in good agreement with theoretical correlation.

Experimental study of local heat transfer in horizontal enclosed layers

1975 ◽  
Vol 29 (2) ◽  
pp. 981-985
Author(s):  
G. N. Dul'nev ◽  
Yu. P. Zarichnyak ◽  
A. V. Sharkov
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Local Heat Transfer ◽  
Local Heat

scholarly journals Experimental study of the heat transfer of two parallel impinging jets

2021 ◽  
Vol 2119 (1) ◽  
pp. 012029
Author(s):  
M V Philippov ◽  
I A Chokhar ◽  
V V Terekhov ◽  
V I Terekhov
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Local Heat Transfer ◽  
Turbulent Jets ◽  
Local Heat ◽  
Impinging Jets ◽  
Jet Interaction ◽  
Flow Parameters ◽  
Integral Characteristics ◽  
Integral Heat

Abstract Local and integral characteristics of heat transfer are obtained at varying the Reynolds number Re = 5500, 11000, the distance between the jets y/D = 1.8, and the distance from the jets to the surface z/D = 0.5-10 for the system of two identical impinging jets. It is found in experiments that the effect of an adjacent jet leads to enhancement of local heat transfer at large distances between the nozzles and the barrier. It is also shown that an increase in the Re number increases integral heat transfer, and, at the same time, weakens the inter-jet interaction. The paper analyzes the scenarios of the behavior of local and integral heat transfer depending on the geometric and flow parameters of the system of two circular turbulent jets.

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