Calculation of Tunnel-induced Upwash Velocities for Swept and Yawed Wings
Calculation of Tunnel-induced Upwash Velocities for Swept and Yawed Wings

Author: S. Katzoff

Publisher:

Published: 1948

Total Pages: 670

ISBN-13:

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The tunnel-induced upwash for a wing of any plan form and load distribution in a rectangular tunnel may be found with the aid of only two charts. One is given in the present paper. The second must be computed for each tunnel. The second chart is given for an open tunnel of 2:1 width-height ratio, a closed tunnel of 2:5 width-height ratio, and a closed tunnel of 10:7 width-height ratio.

Method of Matching Components and Predicting Performance of a Turbine-propeller Engine
Method of Matching Components and Predicting Performance of a Turbine-propeller Engine

Author: Alois T. Sutor

Publisher:

Published: 1951

Total Pages: 706

ISBN-13:

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Analytical expressions are derived to show the geometric, thermodynamic, and aerodynamic relations among compressor, turbine, and exhaust nozzle for a gas-turbine engine. For a known compressor performance map, a matching method is described to show some of the design compromises that must be made when the components are to be combined into a turbine-propeller engine. A method of predicting engine performance for a range of operating conditions from known component maps is presented. An illustrative example of the matching method and the performance analysis is presented, showing some of the practical limitations of engine operation.

Wind-tunnel Lift Interference on Sweptback Wings in Rectangular Test Sections with Slotted Top and Bottom Walls
Wind-tunnel Lift Interference on Sweptback Wings in Rectangular Test Sections with Slotted Top and Bottom Walls

Author: Ray H. Wright

Publisher:

Published: 1966

Total Pages: 28

ISBN-13:

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A theory is presented for the boundary-induced up-wash interference on a sweptback lifting wing mounted at the center of a rectangular wind-tunnel test section with slotted top and bottom walls and closed side walls. A sample calculation for a wing spanning 0.7 of the width of a square tunnel shows the span-wise variation in the interference characteristic of this type of test section. For this example, the wing sweep did not have a large effect on the interference.