Title :
Numerical Study on Heat Transfer Characteristics of Different Rectangular Impinging Jets
Author :
Liping, Geng ; Jingwei, Zhou ; Feifei, Hong ; Mo, Yang
Author_Institution :
Coll. of Thermal Engieering, China Jiliang Univ., Hangzhou, China
Abstract :
A numerical study has been made to examine the thermal fields of rectangular impinging jets with different duty cycle(DC), which is defined as the ratio of pulse cycle on-time to off cycle time in one period, inlet Reynolds number and frequency. The Nusselt numbers show best enhancement with DC=1:3, Re=22000 and f=40Hz. The possible reason for this is that the instantaneous velocity change in this case from off to on and on to off, especially when the velocity changes from onto off, is more severe than other cases.
Keywords :
heat transfer; jets; numerical analysis; turbulence; Nusselt number; duty cycle; frequency 40 Hz; heat transfer characteristics; inlet Reynolds number; instantaneous velocity; numerical simulation; rectangular impinging jet; thermal field; Computational modeling; Fluids; Heat transfer; Numerical models; Numerical simulation; Simulation; Time frequency analysis; Flow Field; Impinging Jet; Numerical Simulation; Reynolds Stress Model (RSM);
Conference_Titel :
Computer Distributed Control and Intelligent Environmental Monitoring (CDCIEM), 2011 International Conference on
Conference_Location :
Changsha
Print_ISBN :
978-1-61284-278-3
Electronic_ISBN :
978-0-7695-4350-5
DOI :
10.1109/CDCIEM.2011.490
