Issue Section:
Technical Briefs
Keywords:
mathematics computing,
flow simulation,
pipe flow,
transfer functions,
heat transfer,
Time Domain Simulation,
Hydraulic,
Pneumatic,
Fluid Transients in Lines,
Transfer Functions
Topics:
Fluids,
Matlab,
Simulation,
Transfer functions,
Unsteady flow,
Pressure,
Brakes,
Cylinders,
Hydraulic brakes
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division July 15, 2003; revised manuscript received September 13, 2004. Review conducted by Y. Tsujimoto.
Hydraulic and pneumatic fluid transmission lines are often internal components within a total dynamic system to be analyzed by time domain simulation. This paper introduces a new and simple approach utilizing MATLAB® computational tools for including the model for the line fluid transients in the model for the overall system. The fluid transients in the lines are based on a laminar flow distributed parameter model, which includes nonlinear frequency dependent viscous friction terms as well as heat transfer effects in gas lines.
Time domain simulation of a system containing fluid line transients is quite complex if the transfer functions for the fluid transients consist of hyperbolic Bessel functions,...
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