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Article

Aerodynamic Testing of Helicopter Side Intake Retrofit Modifications

Chair of Aerodynamics and Fluid Mechanics, Department of Mechanical Engineering, Technical University of Munich, 85748 Garching bei München, Germany
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Aerospace 2017, 4(3), 33; https://doi.org/10.3390/aerospace4030033
Received: 5 May 2017 / Revised: 12 June 2017 / Accepted: 19 June 2017 / Published: 23 June 2017
(This article belongs to the Special Issue Propulsion/Airframe Integration)
Aerodynamic characteristics of helicopter engine side air intakes are investigated. The experimental data set is obtained by wind tunnel testing of a full-scale helicopter fuselage section model. For the simulation of realistic engine operation, engine mass flow rates are reproduced. Five-hole pressure probe data of the aerodynamic interface plane as well as local surface pressure distributions are compared for different geometries and operation conditions. Previous investigations indicate that unshielded, sideways-facing air intakes yield lowest distortion and highest total pressure levels in low speed conditions. In fast forward flight condition, however, forward-facing intake shapes are more beneficial. On this basis, the current research assesses the optimization potential of retrofit modifications such as a rear spoiler (small scoop) and an intake guide vane. Two optimal configurations of retrofit modifications are identified, combining benefits of the various basic intake and plenum chamber shapes. View Full-Text
Keywords: experimental aerodynamics; helicopters; air intakes experimental aerodynamics; helicopters; air intakes
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MDPI and ACS Style

Knoth, F.; Breitsamter, C. Aerodynamic Testing of Helicopter Side Intake Retrofit Modifications. Aerospace 2017, 4, 33. https://doi.org/10.3390/aerospace4030033

AMA Style

Knoth F, Breitsamter C. Aerodynamic Testing of Helicopter Side Intake Retrofit Modifications. Aerospace. 2017; 4(3):33. https://doi.org/10.3390/aerospace4030033

Chicago/Turabian Style

Knoth, Florian, and Christian Breitsamter. 2017. "Aerodynamic Testing of Helicopter Side Intake Retrofit Modifications" Aerospace 4, no. 3: 33. https://doi.org/10.3390/aerospace4030033

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