Two-Phase Nozzle Theory and Parametric Analysis.
Abstract
This study sought to formulate a working theory with which the performance of two-phase nozzles can be analyzed parametrically over a wide range of flow conditions and fluid properties. As a basis for formulating the theory, the technical status of two-phase nozzles was assessed, the governing flow parameters were identified, and the flow domains classified with the previously available theory. A working theory of two-phase nozzles suitable for parametric analyzes and optimization was then formulated, incorporating the significant interphase effects of velocity slip, droplet breakup, and droplet heat transfer. Liquid/gas combinations for two-phase nozzles, and suitable combinations for marine propulsion and other selected applications were discussed. Single-phase (or homogeneous) theory was reviewed from the viewpoints of energy conversion in a nozzle and was compared with models applicable to separate phases in terms of their flow domains. Finally, a working theory of two-phase nozzles was formulated based on the governing flow parameters and on six basic equations that described the two-phase flow. From this theory, a computer model was developed which includes the significant interphase effects of velocity slip, droplet beakup, and heat transfer and which is suitable for parametric analysis and optimization. Preliminary parametric calculations based on use of this model were compared with results from previous two-phase nozzle models and with available experimental data.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1980
- Accession Number
- ADA086795
Entities
People
- Charles W. Deane
- Simion C. Kuo
Organizations
- United Technologies Corporation