Aerodynamic testing of helicopter side intake retrofit modifications

Florian Knoth, Christian Breitsamter

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

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.

Original languageEnglish
Article number33
JournalAerospace
Volume4
Issue number3
DOIs
StatePublished - 1 Sep 2017

Keywords

  • Air intakes
  • Experimental aerodynamics
  • Helicopters

Fingerprint

Dive into the research topics of 'Aerodynamic testing of helicopter side intake retrofit modifications'. Together they form a unique fingerprint.

Cite this