Full Content is available to subscribers

Subscribe/Learn More  >

The Similarity of Ducted Jets With Low and High Pressure Gradients

[+] Author Affiliations
Marcos Noboru Arima, Marcos de Mattos Pimenta, Guilherme Araujo Lima da Silva

Escola Politécnica da Universidade de São Paulo, São Paulo, SP, Brazil

Paper No. FEDSM2008-55299, pp. 413-422; 10 pages
  • ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences
  • Volume 1: Symposia, Parts A and B
  • Jacksonville, Florida, USA, August 10–14, 2008
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-4840-1 | eISBN: 0-7918-3832-3
  • Copyright © 2008 by ASME


The objective of the present work is to study what type of effects the dimensionless jet parameters really consider. To do it, three classical dimensionless jet parameters are redeveloped using an unified methodology. This methodology is based on the integral balances of mass and momentum. The momentum balance terms are classified as inertial or pressure terms and as flux or source terms. This redevelopment enlighten the meaning of the dimensionless jet parameters and allows the definition of a new set of parameters. A scaling methodology is presented to compare the dimensionless jet parameters adequacy in scaling center line jet velocity and jet width at different operational conditions. Two regimes are distinguished: low pressure gradient and high pressure gradient. The scaling for low pressure gradient is based on two criteria: the diffusivity ratio proportionality and the linear expansion rate of the jet. The diffusivity is modelled using the Prandtl’s mixing length model and a dimensional analysis based only on inertial momentum terms. The scaling for high pressure gradient is based on jet velocities and widths scaled simultaneously by pressure and inertial momentum terms. The application of this methodology to jet literature data shows jet similarity for low and high pressure gradients. However, some drawbacks are identified in scaling the jet width at high pressure gradients.

Copyright © 2008 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In