Abstract
Flow separation in de Laval nozzles has been investigated experimentally over a range of divergence angles and reservoir pressures us ing compressed air as a working fluid. The results indicate that the onset of separation in such nozzles is governed primarily by the reservoir pressure and the nozzle divergence angle. However, no quantitat ive treatment has been evolved to unify all the existing experimenta l data. Further experimental work, or a more sophisticated interpretation of available facts, is needed to establish a theory for predicting the plane of separation for a nozzle of given geometry operated under specified condit ions.
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