Index Of Personal Names

Rose, H.G.E.

doi:10.1163/ej.9789004171718.i-336.57

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reduction in the difference between the wake and free stream stagnation pressures, with a consequent reduction in the velocity difference and hence the mixing loss, is seen as an important factor in the efficiency increase occurring at subsonic Mach numbers when compressor axial spacing is decreased. For turbine stator wakes passing through a rotor the wake behavior is less straightforward than that described above [17,18]. There is a need to address this aspect in turbines further, on both a quantitative and mechanistic basis.…”

Section: Freestream Stagnation Pressure Variation In Turbinementioning

confidence: 99%

A Physical Interpretation of Stagnation Pressure and Enthalpy Changes in Unsteady Flow

Hodson

Hynes

Greitzer

et al. 2012

Journal of Turbomachinery

View full text Add to dashboard Cite

This paper provides a physical interpretation of the mechanism of stagnation enthalpy and stagnation pressure changes in turbomachines due to unsteady flow, the agency for all work transfer between a turbomachine and an inviscid fluid. Examples are first given to illustrate the direct link between the time variation of static pressure seen by a given fluid particle and the rate of change of stagnation enthalpy for that particle. These include absolute stagnation temperature rises in turbine rotor tip leakage flow, wake transport through downstream blade rows, and effects of wake phasing on compressor work input. Fluid dynamic situations are then constructed to explain the effect of unsteadiness, including a physical interpretation of how stagnation pressure variations are created by temporal variations in static pressure; in this it is shown that the unsteady static pressure plays the role of a time-dependent body force potential. It is further shown that when the unsteadiness is due to a spatial nonuniformity translating at constant speed, as in a turbomachine, the unsteady pressure variation can be viewed as a local power input per unit mass from this body force to the fluid particle instantaneously at that point.

show abstract

Section: Freestream Stagnation Pressure Variation In Turbinementioning

confidence: 99%