Engine power simulation for transonic flow-through nacelles

Abstract

Conclusions Heterogeneous nucleation is seen to begin at partial pressures of about 10 times the wall partial pressure. Homogeneous nucleation is seen to begin at partial pressures on the order of 10 times the wall partial pressure. Initial gas temperature has only a weak effect on the onset of snow as long as the wall temperatures are substantially below this inlet temperature. Snow may be avoided by. staying below the onset curves, lowering the inlet partial pressures of the water vapor, or increasing the wall temperatures. These calculations and curves apply to any uniform temperature water cold trap. These curves can even be used to predict the humidity required for the thin natural convection boundary layer flowing down the outside of a glass of ice water to be visible due to small droplet formation (fog) in this boundary layer.