Author: C. L. Ball
Publisher:
ISBN:
Category :
Languages : en
Pages : 23
Book Description
Detailed flow measurements in the casing boundary layer of a two-stage transonic fan were taken at stations upstream of the fan, between all blade rows, and downstream of the last blade row. At the design tip speed of 429 m/sec the fan achieved a peak efficiency of 0.846 at a pressure ratio of 2.471. Boundary layer data were obtained at three weight flows at the design speed: one near choke flow, one near peak efficiency, and one near stall. Conventional boundary layer parameters were calculated from the data for each of the three flows. A classical two-dimensional casing boundary layer was measured at the exit of each blade row and extended inward to approximately 10% of span. The steep radial gradient of axial velocity noted at the exit of the rotors was reduced substantially as the flow passed through the stators. This reduced gradient is attributed of total temperature as the flow passed through the stators. The data also show overturning of the tip flow at the stator exists that is consistent with the expected effect of the secondary flow field.
End-Wall Boundary Layer Measurements in a Two-Stage Fan
Author: C. L. Ball
Publisher:
ISBN:
Category :
Languages : en
Pages : 23
Book Description
Detailed flow measurements in the casing boundary layer of a two-stage transonic fan were taken at stations upstream of the fan, between all blade rows, and downstream of the last blade row. At the design tip speed of 429 m/sec the fan achieved a peak efficiency of 0.846 at a pressure ratio of 2.471. Boundary layer data were obtained at three weight flows at the design speed: one near choke flow, one near peak efficiency, and one near stall. Conventional boundary layer parameters were calculated from the data for each of the three flows. A classical two-dimensional casing boundary layer was measured at the exit of each blade row and extended inward to approximately 10% of span. The steep radial gradient of axial velocity noted at the exit of the rotors was reduced substantially as the flow passed through the stators. This reduced gradient is attributed of total temperature as the flow passed through the stators. The data also show overturning of the tip flow at the stator exists that is consistent with the expected effect of the secondary flow field.
Publisher:
ISBN:
Category :
Languages : en
Pages : 23
Book Description
Detailed flow measurements in the casing boundary layer of a two-stage transonic fan were taken at stations upstream of the fan, between all blade rows, and downstream of the last blade row. At the design tip speed of 429 m/sec the fan achieved a peak efficiency of 0.846 at a pressure ratio of 2.471. Boundary layer data were obtained at three weight flows at the design speed: one near choke flow, one near peak efficiency, and one near stall. Conventional boundary layer parameters were calculated from the data for each of the three flows. A classical two-dimensional casing boundary layer was measured at the exit of each blade row and extended inward to approximately 10% of span. The steep radial gradient of axial velocity noted at the exit of the rotors was reduced substantially as the flow passed through the stators. This reduced gradient is attributed of total temperature as the flow passed through the stators. The data also show overturning of the tip flow at the stator exists that is consistent with the expected effect of the secondary flow field.
Detailed Flow Measurements in Casing Boundary Layer of 429-meter-per-second-tip-speed Two-stage Fan
Author: William T. Gorrell
Publisher:
ISBN:
Category : Impellers
Languages : en
Pages : 40
Book Description
Detailed flow measurements made in the casing boundary layer of a two-stage transonic fan are summarized. These measurements were taken at stations upstream of the fan, between all blade rows, and downstream of the last blade row. At the design tip speed (429 m/sec) the fan achieved a peak efficiency of 0.846 at a pressure ratio of 2.471. The boundary layer data were obtained at three weight flows at the design speed: one near choke flow, one near peak efficiency, and one near stall. The data presented show steep axial velocity profiles at the stator exits were not as steep as those at the rotor exits. The data also show overturning of the flow at the tip at the stator exits. The effect of mixing is shown by the redistribution of the first-stage rotor-exit total temperature profile as is passes through the following stator.
Publisher:
ISBN:
Category : Impellers
Languages : en
Pages : 40
Book Description
Detailed flow measurements made in the casing boundary layer of a two-stage transonic fan are summarized. These measurements were taken at stations upstream of the fan, between all blade rows, and downstream of the last blade row. At the design tip speed (429 m/sec) the fan achieved a peak efficiency of 0.846 at a pressure ratio of 2.471. The boundary layer data were obtained at three weight flows at the design speed: one near choke flow, one near peak efficiency, and one near stall. The data presented show steep axial velocity profiles at the stator exits were not as steep as those at the rotor exits. The data also show overturning of the flow at the tip at the stator exits. The effect of mixing is shown by the redistribution of the first-stage rotor-exit total temperature profile as is passes through the following stator.
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 292
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 292
Book Description
NASA Technical Paper
Author: United States. National Aeronautics and Space Administration
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 40
Book Description
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 40
Book Description
Secondary Flows and Endwall Boundary Layers in Axial Turbomachines
Author:
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 534
Book Description
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 534
Book Description
Detailed Flow Measurements in Casing Boundary Layer of 427-meter-per-second-tip-speed Two-stage Fan with Casing Treatment
Author: William T. Gorrell
Publisher:
ISBN:
Category : Impellers
Languages : en
Pages : 44
Book Description
Publisher:
ISBN:
Category : Impellers
Languages : en
Pages : 44
Book Description
Energy Research Abstracts
Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 1430
Book Description
Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 1430
Book Description
Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Performance of Two-stage Fan with a First-stage Rotor Redesigned to Account for the Presence of a Part-span Damper
Author: William T. Gorrell
Publisher:
ISBN:
Category :
Languages : en
Pages : 82
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 82
Book Description
Monthly Catalogue, United States Public Documents
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1258
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1258
Book Description
Monthly Catalog of United States Government Publications
Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages :
Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages :
Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index