Acceleration of Liquids in Two Phase Nozzles

Two-phase nozzle flow of liquid drops mixed with a gas is analyzed for both the one-component and _he two-component eases. Drop volume, drop breakup and vaporization, variable fluid properties, and solubility of the gas in the liquid are taken into aeeount. Computer programs employing the analysis provide gas and liquid veloeities and temperatures, as well as drop diameter, as a function of distance through a nozzle when initial conditions and fluid properties are specified. Wall shear and boundary-layer growth are also eomputed, and an option provides the optimum (maximum exit velocity for given length) nozzle contour. Calculations for typical fluids illustrate the effect on nozzle exit velocity of nozzle contour and length, initial drop size, mixture ratio, and pressure ratio. Nozzle experiments with nitrogen-water mixtures and Freon-water mixtures show that actual velocities and flow rates agree with the analysis within 5%. JPL TECHNICAL REPORT 32-987 vii