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Under-Expanded Gaseous Flow at a Straight Micro-Tube Exit

In English

Författare

  • Takahiro Yoshimaru
  • Yutaka Asako
  • Toru Yamada

Summary, in English

This paper focuses on under-expanded gaseous flow at a straight micro-tube exit. The pitot total pressure of gas flow (jet) in the downstream region from a straight micro-tube exit was measured by a total pressure pitot tube to accumulate data for validation of numerical results. A micro-tube of 495 mu m in diameter and 56.3 mm in length and a total pressure pitot tube of 100 mu m in outer diameter were used. The pitot total pressure was measured at intervals of 0.1 mm in both the flow and radial directions. The measurement was done for the mass flow rates of 9.71 x 10(-5) kg/s and 1.46 x 10(-4) kg/s. The data were accumulated for validation of the numerical results to reveal the characteristics of the under-expanded gas flow at the exit of a micro-tube. Comparisons were conducted for numerical results of corresponding cases and a slight discrepancy can be seen between numerical and experimentally measured pitot total pressures.

Avdelning/ar

Publiceringsår

2014

Språk

Engelska

Publikation/Tidskrift/Serie

Journal of Fluids Engineering

Volym

136

Issue

8

Dokumenttyp

Artikel i tidskrift

Förlag

American Society Of Mechanical Engineers (ASME)

Ämne

  • Energy Engineering

Nyckelord

  • micro-tube
  • gaseous flow
  • under-expanded flow
  • pitot total pressure

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0098-2202