Browsing by Author "Greenwood, S. W."

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    Atmosphere breathing engines in astronautics
    (College of Aeronautics, 1958-10) Greenwood, S. W.; Carton, D. S.
    The contents of this note fall into two sections. Part I considers the possibilities and problems involved in using ramjets as a power source for one of the stages of a satellite launching vehicle or similar project. In comparing such a system with rocket powered vehicles, consideration is given to both performance and mass of the various systems. Various trajectories are considered. This work includes a reassessment of projects that have been suggested elsewhere. The second part examines the possibility of using forms of ramjet in the atmosphere of other planets. Because there is insufficient knowledge of these atmospheres, a study has been carried out to determine the approximate performance of a chemical ramjet in atmospheres of Methane, Ammonia, Hydrogen and Carbon Dioxide at Mach 3. The work in Part II is original, there being no previously reported papers on the subject known. These studies, which are necessarily based on several simplifying assumptions, indicate that applications for these engines may be expected to arise in astronautics, and that this is a fruitful field for further studies.
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    The effect of combustor outlet temperature profiles on ramjet thrust
    (College of Aeronautics, 1957-07) Williams, M. R.; Greenwood, S. W.
    The desirability of obtaining an even distribution of temperature at the outlet of a ramjet combustor is indicated theoretically. Results of experiments on a particular combustion system over a limited range of conditions using a series of mixers are presented. The results suggest that mixers are desirable for high Mach Number ramjets operating at low overall fuel-air ratios. The material presented in this report is based on the work carried out by M. R. Williams in partial fulfilment of the requirements for the Diploma of the College of Aeronautics, and is essentially a summary of his thesis. The work was part of M.O.S. Research Contract 7/Exptl./720