Some experiments on steady and unsteady flow of air through wire gauzes

Abdelghany, Seif Mahmoud; Horlock, J. H.

doi:10.1016/0020-7403(66)90021-x

Cited by 4 publications

(1 citation statement)

References 2 publications

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“…It will be assumed that we can describe the reversed fldw in terms of an equivalent quasi-steady orifice flow characteristic. Use of quasi-steady flow characteristics under such nonsteady flow conditions is quite adequate and has been verified experimentally [4,5,6]. Based on this model and its assumptions, the following equations can be derived.…”

Section: Blade Deflectionmentioning

confidence: 98%

Surge-Induced Structural Loads in Gas Turbines

Mazzawy

1980

Journal of Engineering for Power

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The axial flow compression system of a modern gas turbine engine normally delivers a large quantity of airflow at relatively high velocity. The sudden stoppage (and reversal) of this flow when an engine surges can result in structural loads in excess of steady state levels. These loads can be quite complex due to inherent asymmetry in the surge event. The increasing requirements for lighter weight engine structures, coupled with the higher pressure ratio cycles required for minimizing fuel consumption, make the accurate prediction of these loads an important part of the engine design process. This paper is aimed toward explaining the fluid mechanics of the surge phenomenon and its impact on engine structures. It offers relatively simple models for estimating surge-induced loads on various engine components. The basis for these models is an empirical correlation of surgeinduced inlet overpressure based on engine pressure ratio and bypass ratio. An approximate estimate of the post-surge axial pressure distribution can be derived from this correlation by assuming that surge initiation occurs in the rear of the compression system. Downloaded From: http://gasturbinespower.asmedigitalcollection.asme.org/ on 06/08/2015 Terms of Use: http://asme.org/terms Subscripts ex = exit plane in = inlet plane Journal of Engineering for Power JANUARY 1980, VOL. 102 / 163 Downloaded From: http://gasturbinespower.asmedigitalcollection.asme.org/ on 06/08/2015 Terms of Use: http://asme.org/terms

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Section: Blade Deflectionmentioning

confidence: 98%