A set of essential adjustable experimental apparatus with high accurate, is designed to study the condensation phenomenon.
The time-averaged pressure and transient pressure at different inlet conditions of two different nozzles are analyzed.
The results of time averaged pressure sensors shows that the location of condensation moves forward and the intensity increases with the increase of Φ0 and T0. Meanwhile, the location of condensation moves forward with the increase of p0 while the intensity is weaken.
The oscillating frequency will rise with the increase of Φ0 and T0, while it will decrease with the increase of p0. More importantly, the frequency will change with different structures of nozzles which is basically consistent with semi-empirical formula. |