Two-dimensional flow properties of micronozzle under varied isothermal wall conditions Online publication date: Sat, 30-Aug-2014
by Amar Hasan Hameed; Raed Kafafy; Waqar Asrar; Moumen Idres
International Journal of Engineering Systems Modelling and Simulation (IJESMS), Vol. 5, No. 4, 2013
Abstract: A new technology, which uses thermoelectric elements as side-walls of microthrusters for heating and cooling purpose, is emerging. This technique can improve the performance of low-Reynolds-number microthrusters as a result of increasing the flow momentum forces or decreasing the viscous forces. In the present paper, we focus on the effect of using heated or cooled walls to control the properties of the flow through a micronozzle. Viscous compressible laminar flow is solved in the micronozzle. Different isothermal divergent-wall temperatures are tested to study the impact of wall temperature on the fundamental properties of momentum forces. The temperature difference between the wall and the gas effects the static temperature and static pressure profile, Mach number is increased, density near the wall is increased due to cooling. Alleviation of viscous losses by cooling the supersonic flow in the expander is demonstrated by the reduction of the thickness of the subsonic boundary layer.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Engineering Systems Modelling and Simulation (IJESMS):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook