THEORY ON OPTIMUM PERFORMANCE OF MODERN JET EJECTORS.
NAVAL RESEARCH LAB WASHINGTON D C
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A theoretical investigation was made of the optimum performance of a single-stage jet ejector with allowances made for the differences in temperature and molecular weight of the motive gas and the suction gas. Constant-pressure mixing of the motive and suction gases was assumed in the analytical model, and the task of optimization was carried out by rigorous mathematical operation. The analysis considers the case in which supersonic flow and hence normal shock occurs in the injector and the case of flow without normal shock. Numerical calculations of results were performed on an electronic digital computer for four selected typical examples of practical importance in the ranges of operating conditions of modern jet ejectors. These examples involved the following respective combinations of motive gas and suction gas steam and air, silicone oil and air, steam and steam, and air and air. The results were found to compare rather satisfactorily with reported performance characteristics of a jet ejector. Author
- Plasma Physics and Magnetohydrodynamics