3.6.2 Determination of the expansion ratio (a) Apparatus: - plastic collecting vessel of volume V, approximately 500 L and accurately known to +/- 5 L; - high expansion foam-making equipment which when tested with water has a flow rate of 6.1 +/- 0.1 L/min at a nozzle pressure of (5.0 +/- 0.1) bar. An
Nozzle Using Dieren t T urbulence Mo dels S No ori and A ... calculate radius and o w prop erties at eac ... h longitudinal station of the plug The expansion ratio ...
Thus the jet noise would reflect the change in nozzle structure. Experiments with cold jet flow were conducted to explore the relationship between nozzle deformation and the spectrum pattern of jet noise. Three groups of nozzles with different expansion ratio, length of expand segment, and throat structure were used in the experiment.
Proptools provides implementations of equations for nozzle flow, turbo-machinery and rocket structures. The project aims to cover most of the commonly used equations in Rocket Propulsion Elements by George Sutton and Oscar Biblarz and Modern Engineering for Design of Liquid-Propellant Rocket Engines by Dieter Huzel and David Huang.