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

Yoshimaru, Takahiro ; Asako, Yutaka and Yamada, Toru LU (2014) In Journal of Fluids Engineering 136(8).
Abstract
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... (More)
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. (Less)
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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
micro-tube, gaseous flow, under-expanded flow, pitot total pressure
in
Journal of Fluids Engineering
volume
136
issue
8
article number
081204
publisher
American Society Of Mechanical Engineers (ASME)
external identifiers
  • wos:000338507900007
  • scopus:84901044251
ISSN
0098-2202
DOI
10.1115/1.4026958
language
English
LU publication?
yes
id
f3fd653a-b183-40a1-91dc-7df12fe4b0a7 (old id 4602608)
date added to LUP
2016-04-01 14:16:52
date last changed
2021-09-22 01:16:55
@article{f3fd653a-b183-40a1-91dc-7df12fe4b0a7,
  abstract     = {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.},
  author       = {Yoshimaru, Takahiro and Asako, Yutaka and Yamada, Toru},
  issn         = {0098-2202},
  language     = {eng},
  number       = {8},
  publisher    = {American Society Of Mechanical Engineers (ASME)},
  series       = {Journal of Fluids Engineering},
  title        = {Under-Expanded Gaseous Flow at a Straight Micro-Tube Exit},
  url          = {http://dx.doi.org/10.1115/1.4026958},
  doi          = {10.1115/1.4026958},
  volume       = {136},
  year         = {2014},
}