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 495μm in diameter and 56.3 mm in length and a total pressure pitot tube of 100 μm 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 × 10−5 kg/s and 1.46 × 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.
Under-Expanded Gaseous Flow at a Straight Micro-Tube Exit
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received October 2, 2013; final manuscript received February 20, 2014; published online May 19, 2014. Assoc. Editor: Daniel Attinger.
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Yoshimaru, T., Asako, Y., and Yamada, T. (May 19, 2014). "Under-Expanded Gaseous Flow at a Straight Micro-Tube Exit." ASME. J. Fluids Eng. August 2014; 136(8): 081204. https://doi.org/10.1115/1.4026958
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