Research output: Contribution to journal › Conference article › peer-review
Heat transfer of impinging jet at low reynolds number. / Lemanov, Vadim V.; Terekhov, Victor I.; Terekhov, Vladimir V.
In: International Heat Transfer Conference, Vol. 2018-August, 01.01.2018, p. 5501-5508.Research output: Contribution to journal › Conference article › peer-review
}
TY - JOUR
T1 - Heat transfer of impinging jet at low reynolds number
AU - Lemanov, Vadim V.
AU - Terekhov, Victor I.
AU - Terekhov, Vladimir V.
PY - 2018/1/1
Y1 - 2018/1/1
N2 - Thermal characteristics at impact axisymmetric air jet impingement on a flat obstacle have been studied experimentally and numerically. The influence of Reynolds number (100<Re<12000) on heat transfer at jet outflow from a long pipe (with diameter d=3.2 mm and relative length h/d =200) was studied at a distance to the obstacle h/d=20 and at constant wall temperature. In the area of Re<4000, in contrast to the known monotonous growth of heat transfer, the maximum heat transfer has been discovered. For the outflow from the tube there is a significant increase in Nusselt number up to 200-600% in comparison with the case when the jet outflows from the nozzle. At Re>4000 the difference in thermal transfer for the two versions of jet formation (from the tube and from the nozzle) asymptotically decreases. The numerical results qualitatively agree with experimental data in laminar and turbulent flow regimes.
AB - Thermal characteristics at impact axisymmetric air jet impingement on a flat obstacle have been studied experimentally and numerically. The influence of Reynolds number (100<Re<12000) on heat transfer at jet outflow from a long pipe (with diameter d=3.2 mm and relative length h/d =200) was studied at a distance to the obstacle h/d=20 and at constant wall temperature. In the area of Re<4000, in contrast to the known monotonous growth of heat transfer, the maximum heat transfer has been discovered. For the outflow from the tube there is a significant increase in Nusselt number up to 200-600% in comparison with the case when the jet outflows from the nozzle. At Re>4000 the difference in thermal transfer for the two versions of jet formation (from the tube and from the nozzle) asymptotically decreases. The numerical results qualitatively agree with experimental data in laminar and turbulent flow regimes.
KW - Convection
KW - Experimental and computational methods
KW - Heat transfer enhancement
KW - Impinging jets
KW - Jet and spray
KW - Laminar-turbulent transition
KW - Turbulent spots
KW - Vortex structure
UR - http://www.scopus.com/inward/record.url?scp=85068309340&partnerID=8YFLogxK
U2 - 10.1615/ihtc16.hte.023057
DO - 10.1615/ihtc16.hte.023057
M3 - Conference article
AN - SCOPUS:85068309340
VL - 2018-August
SP - 5501
EP - 5508
JO - International Heat Transfer Conference
JF - International Heat Transfer Conference
SN - 2377-424X
T2 - 16th International Heat Transfer Conference, IHTC 2018
Y2 - 10 August 2018 through 15 August 2018
ER -
ID: 20776790