Losses across Abrupt Enlargements and Contractions
One’s ability to evaluate the pressure loss associated with a given flow system is dependent upon the available knowledge of the loss coefficients of the specific elements comprising the flow system. Therefore the success of such an evaluation is dictated by the validity of the established values of these coefficients. Although numerous references can be found specifying values for these loss elements, most are vague when specifying their limitations. Also, since a large part of these data was obtained for constant-density fluids, the investigator is usually confronted with the problem of how applicable they are when compressible fluids are involved. Two of the more common loss elements encountered in flow systems are the abrupt enlargement and contraction elements. Recent studies,* both analytical and experimental, performed on these elements for both compressible and constant-density fluids are presented in this chapter.
KeywordsPressure Loss Diameter Ratio Loss Coefficient Compressible Fluid Total Pressure Loss
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