Development of experimental techniques for the characterization of helicoidal fin arrays in transonic flow conditions

Laura Villafañe, Tolga Yasa, Guillermo Paniagua, Glauco Bonfanti

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The current research focuses on the aerodynamic investigation of the three dimensional turbofan bypassflow and its interaction with a finned air/oil surface heat exchanger integrated at the inner wall of the secondary duct. This paper addresses the experimental methodology employed in a new transonic facility characterized by a complex 3D test section. The development of accurate and relatively short time response measurement techniques is essential for the evaluation of the flow by means of map measurements at different locations along the test section. Flow angles, total and static pressures are computed using a new methodology for the processing of the pressure readings acquired by means of hemispherical five-hole probes. The sensibility of the probes and the errors on the angle determination are analyzed. Errors lower than 0.4 deg. for the determination of yaw and flow angles are obtained. The response of the shielded thermocouples designed for the temperature measurements are studied by means of conjugate heat transfer simulations. The numerical methodology is described and the steady and transient temperature effects evaluated. An innovative procedure for shear stress measurements based on oil-dot techniques is discussed and applied on a representative test bench for validation. Results are comparable with theoretical and empirical wall shear stress correlations for the case of a flat plate in subsonic flow conditions.

Original languageEnglish (US)
Title of host publication47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2011
StatePublished - Dec 1 2011
Externally publishedYes
Event47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2011 - San Diego, CA, United States
Duration: Jul 31 2011Aug 3 2011

Publication series

Name47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2011

Other

Other47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2011
CountryUnited States
CitySan Diego, CA
Period7/31/118/3/11

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Aerospace Engineering
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering

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