TY - JOUR
T1 - Pulsed radial jet reattachment nozzle
AU - James, D. L.
AU - Castleberry, J. A.
AU - Pak, J. Y.
N1 - Funding Information:
The authors would like to express gratitude to the Center for Energy Research, Texas Tech University for financial support of this work.
PY - 1999/8/1
Y1 - 1999/8/1
N2 - Steady periodic surface pressure distributions have been obtained for a mechanically pulsed radial jet reattachment (PRJR) nozzle. Local time-averaged and average Nusselt numbers have been obtained for air flow exiting a PRJR nozzle and impinging on a flat plate. The Nusselt numbers were obtained as a function of the following nondimensional nozzle parameters: Reynolds number, nozzle to plate spacing, exit angle, Strouhal number (pulsation frequency), exit gap spacing, and pulsation amplitude. The nozzle exit gap is cyclically varied for a PRJR nozzle, causing pulsations in the flow field that alter the convective coefficients and surface pressure distribution when compared to flow exiting an RJR nozzle under similar conditions. It was shown that the Nusselt number is a strong function of the Reynolds number, exit angle, and the combined effects of nozzle height, pulsation amplitude, and pulsation frequency.
AB - Steady periodic surface pressure distributions have been obtained for a mechanically pulsed radial jet reattachment (PRJR) nozzle. Local time-averaged and average Nusselt numbers have been obtained for air flow exiting a PRJR nozzle and impinging on a flat plate. The Nusselt numbers were obtained as a function of the following nondimensional nozzle parameters: Reynolds number, nozzle to plate spacing, exit angle, Strouhal number (pulsation frequency), exit gap spacing, and pulsation amplitude. The nozzle exit gap is cyclically varied for a PRJR nozzle, causing pulsations in the flow field that alter the convective coefficients and surface pressure distribution when compared to flow exiting an RJR nozzle under similar conditions. It was shown that the Nusselt number is a strong function of the Reynolds number, exit angle, and the combined effects of nozzle height, pulsation amplitude, and pulsation frequency.
UR - http://www.scopus.com/inward/record.url?scp=0345188705&partnerID=8YFLogxK
U2 - 10.1016/S0017-9310(98)00359-7
DO - 10.1016/S0017-9310(98)00359-7
M3 - Article
AN - SCOPUS:0345188705
VL - 42
SP - 2921
EP - 2933
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
SN - 0017-9310
IS - 15
ER -