Experimental Study of Through-Flowing Pneumatic Lines

[+] Author and Article Information
P. A. Orner

Systems Engineering Division, Case Western Reserve University, Cleveland, Ohio

W. C. Cooley

Autonetics Division, North American Rockwell Corp., Anaheim, Calif.

J. Basic Eng 92(4), 849-856 (Dec 01, 1970) (8 pages) doi:10.1115/1.3425156 History: Received February 11, 1970; Online October 27, 2010


The complete linear two-port admittance parameters of a short uniform pneumatic line are experimentally determined as functions of driving frequency and the steady through-flow in the line. The measured through-flow influence (c.f. the driving point admittance increase) is found to be much greater than that predicted by known one-dimensional acoustic models (frequency dependent phase velocity and attenuation factor) with mean velocity Doppler shift correction. More satisfactory agreement is found with a model which considers the first-order effects of the through-flow velocity profile. High-frequency (up to 2500 Hz) laminar dynamic flow and pressure data is presented for lines on the order of 6 in. long and 1/8 in. ID, with Mach numbers from zero to 0.16. The experimental aspects of quantitative dynamic flow measurement with a hot-wire anemometer are discussed in detail. Details and calibration of the high-frequency line flow and pressure probes, and the low Reynolds number—high Mach number flow test setup are presented.

Copyright © 1970 by ASME
Your Session has timed out. Please sign back in to continue.





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 Journal Articles
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