THE DETERMINATION OF OPTIMUM NOZZLE PROFILES TO DELAY CHEMICALLY FROZEN FLOW IN THE EXPANSION OF HIGH TEMPERATURE GAS MIXTURES.
Abstract
An approximate method is presented which yields the supersonic nozzle profile necessary to keep an expanding high temperature gas mixture approximately in chemical equilibrium. From equilibrium calculations for given chamber conditions the freeze area ratio is determined by use of a modified Bray driterion. A plot of area ratio versus a function of nozzle geometry defines a limiting nozzle angle beyond which freezing is forecast to occur. This permits an expansion angle at each area ratio to be chosen to keep the flow near equilibrium. The effectiveness of the resulting nozzle profile is evaluated by comparting exact calculations with equilibrium calculations. Contouring is shown to be effective for small nozzles when a correction factor is applied. The hydrogen-oxygen system is used as an example. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1966
- Accession Number
- AD0486364
Entities
People
- Larry Duane Kunkel
Organizations
- Naval Postgraduate School