Experimental Investigation Of Boundary Layer Behavior In A Simulated Low Pressure Turbine Nasa Tm 1998 207921 Sep 15 1998

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Experimental Investigation Of Boundary Layer Behavior In A Simulated Low Pressure Turbine Nasa Tm 1998 207921 Sep 15 1998

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Author : United States. National Aeronautics and Space Administration
language : en
Publisher:
Release Date : 1999*

Experimental Investigation Of Boundary Layer Behavior In A Simulated Low Pressure Turbine Nasa Tm 1998 207921 Sep 15 1998 written by United States. National Aeronautics and Space Administration and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999* with categories.

Experimental Investigation Of Boundary Layer Behavior In A Simulated Low Pressure Turbine

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Author : Ki-Hyeon Sohn
language : en
Publisher:
Release Date : 1998

Experimental Investigation Of Boundary Layer Behavior In A Simulated Low Pressure Turbine written by Ki-Hyeon Sohn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Boundary layers categories.

Experimental Study Of Boundary Layer Behavior In A Simulated Low Pressure Turbine Nasa Tm 1998 208503 Jan 20 1999

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Author : United States. National Aeronautics and Space Administration
language : en
Publisher:
Release Date : 1999*

Experimental Study Of Boundary Layer Behavior In A Simulated Low Pressure Turbine Nasa Tm 1998 208503 Jan 20 1999 written by United States. National Aeronautics and Space Administration and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999* with categories.

Experimental Investigation Of Boundary Layer Behavior In A Simulated Low Pressure Turbine Asme 98 Gt 34

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Author : Ki H. Sohn
language : en
Publisher:
Release Date : 1998

Experimental Investigation Of Boundary Layer Behavior In A Simulated Low Pressure Turbine Asme 98 Gt 34 written by Ki H. Sohn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.

Presented at the International Gas Turbine & Aeroengine Congress & Exhibition, Stockholm, Sweden, June 2 - June 5, 1998.

Experimental Study Of Boundary Layer Behavior In A Simulated Low Pressure Turbine

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Author : Rickey J. Shyne
language : en
Publisher:
Release Date : 1998

Experimental Study Of Boundary Layer Behavior In A Simulated Low Pressure Turbine written by Rickey J. Shyne and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Turbines categories.

Experimental Study Of Transitional Flow Behavior In A Simulated Low Pressure Turbine

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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-07-24

Experimental Study Of Transitional Flow Behavior In A Simulated Low Pressure Turbine written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-24 with categories.

A detailed investigation of the flow physics occurring on the suction side of a simulated Low Pressure Turbine (LPT) blade was performed. A contoured upper wall was designed to simulate the pressure distribution of an actual LPT airfoil onto a flat lower plate. The experiments were carried out for the Reynolds numbers of 35,000, 70,000, 100,000 and 250,000 with four levels of freestream turbulence ranging from 1% to 4%. For the three lower Reynolds numbers, the boundary layer on the flat plate was separated and formed a bubble. The size of laminar separation bubble was measured to be inversely proportional to the freestream turbulence levels and Reynolds numbers. However, no separation was observed for the Re = 250,000 case. The transition on a separated flow was found to proceed through the formation of turbulent spots in the free shear layer as evidenced in the intermittency profiles for Re = 35,000, 70,000 and 100,000. Spectral data show no evidence of Kelvin-Helmholtz or Tollmien-Schlichting instability waves in the free shear layer over a separation bubble (bypass transition). However, the flow visualization revealed the large vortex structures just outside of the bubble and their development to turbulent flow for Re = 50,000, which is similar to that in the free shear layer (separated-flow transition). Therefore, it is fair to say that the bypass and separated-flow transition modes coexist in the transitional flows over the separation bubble for certain conditions. Transition onset and end locations and length determined from intermittency profiles decrease as Reynolds number and freestream turbulence levels increase. Sohn, Ki Hyeon and DeWitt, Kenneth J. Glenn Research Center NCC3-288...

Study Of Boundary Layer Development In A Two Stage Low Pressure Turbine

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Author : National Aeronautics and Space Adm Nasa
language : en
Publisher: Independently Published
Release Date : 2018-09-17

Study Of Boundary Layer Development In A Two Stage Low Pressure Turbine written by National Aeronautics and Space Adm Nasa and has been published by Independently Published this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-17 with Science categories.

Experimental data from jet-engine tests have indicated that unsteady blade row interactions and separation can have a significant impact on the efficiency of low-pressure turbine stages. Measured turbine efficiencies at takeoff can be as much as two points higher than those at cruise conditions. Several recent studies have revealed that Reynolds number effects may contribute to the lower efficiencies at cruise conditions. In the current study numerical simulations have been performed to study the boundary layer development in a two-stage low-pressure turbine, and to evaluate the transition models available for low Reynolds number flows in turbomachinery. The results of the simulations have been compared with experimental data, including airfoil loadings and integral boundary layer quantities. The predicted unsteady results display similar trends to the experimental data, but significantly overestimate the amplitude of the unsteadiness. The time-averaged results show close agreement with the experimental data.Dorney, Daniel J. and Ashpis, David E. and Halstead, David E. and Wisler, David C.Glenn Research CenterJET ENGINES; TWO STAGE TURBINES; COMPUTERIZED SIMULATION; BALDWIN-LOMAX TURBULENCE MODEL; BOUNDARY LAYER TRANSITION; TRANSITION FLOW; FLOW VISUALIZATION; BOUNDARY LAYER SEPARATION; SEPARATED FLOW; ROTOR BLADES (TURBOMACHINERY); TAKEOFF; CRUISING FLIGHT; COMPUTATIONAL GRIDS; NOZZLE FLOW; SKIN FRICTION; TURBINE BLADES; REYNOLDS NUMBER; FLOW CHARACTERISTICS; FLOW DISTRIBUTION

Study Of Boundary Layer Development In A Two Stage Low Pressure Turbine Nasa Tm 1999 208913 Mar 1 1999

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Author : United States. National Aeronautics and Space Administration
language : en
Publisher:
Release Date : 1999*

Study Of Boundary Layer Development In A Two Stage Low Pressure Turbine Nasa Tm 1999 208913 Mar 1 1999 written by United States. National Aeronautics and Space Administration and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999* with categories.

Preliminary Experimental Investigation Of Effect Of Free Stream Turbulence On Turbulent Boundary Layer Growth

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Author : S. J. Kline
language : en
Publisher:
Release Date : 1960

Preliminary Experimental Investigation Of Effect Of Free Stream Turbulence On Turbulent Boundary Layer Growth written by S. J. Kline and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Fluid dynamics categories.

Experimental Study Of Transitional Flow Behavior In A Simulated Low Pressure Turbine

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Author : Nasa Technical Reports Server (Ntrs)
language : en
Publisher: BiblioGov
Release Date : 2013-07

Experimental Study Of Transitional Flow Behavior In A Simulated Low Pressure Turbine written by Nasa Technical Reports Server (Ntrs) and has been published by BiblioGov this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-07 with categories.

The NASA Technical Reports Server (NTRS) houses half a million publications that are a valuable means of information to researchers, teachers, students, and the general public. These documents are all aerospace related with much scientific and technical information created or funded by NASA. Some types of documents include conference papers, research reports, meeting papers, journal articles and more. This is one of those documents.