Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-130-9

International Heat Transfer Conference 6
August, 7-11, 1978, Toronto, Canada

HEAT TRANSFER UNDER A LAMINAR SWIRLING IMPINGING JET - A NUMERICAL STUDY

Get access (open in a dialog) DOI: 10.1615/IHTC6.1420
pages 311-316

Abstrakt

A computer program was developed to predict the flow and heat transfer characteristics of a partially-confined laminar swirling jet. The program was based on a hybrid finite-differencing scheme to solve the full Navier−Stokes equations in their primitive form (velocities and pressure) together with the energy equation.

A parametric study was made which included the effects of nozzle-to-plate spacing, plate diameter, jet Reynolds number, swirl number, inlet axial and swirl velocity profiles and suction/blowing at the impingement surface. Addition of swirl was found to enhance spreading at a rate dependent on both the swirl number and inlet swirl velocity profile. Large swirl numbers generated a toroidal recirculation zone in the stagnation region which acts as an insulator and depresses the heat transfer rate. Application of suction at the plate was found to cause appreciable increase in impingement heat transfer.