Low-speed aerodynamic characteristics of a busemann-type silent supersonic biplane

Hiromitsu Kawazoe, Shinji Abe, Takashi Matsuno, Goji Yamada, Shigeru Obayashi

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

Abstract

Aerodynamic performances of three Busemanntypes of silent supersonic biplanes were studied by a low-speed wind tunnel experiment. These wings have the plane configurations of the front-side tapered, the rear-side tapered and the both-side tapered shape. Lift, drag and pitching moment of the biplanes were measured in the both cases of their pitching motion and the static conditions by using the compact force balance developed in the authors' laboratory of Tottori University. All of the three biplanes show the same CL characteristic as a thin wing at a low angle of attack. The biplane with the front-side tapered shape has the larger lift inclination in the attack angle from eight to seventeen degrees than the other biplanes and indicates clearly the stall phenomena at the attack angle of seventeen degrees. It was found that the front-side tapered wing generates leading edge separation vortices just like a delta wing and the occurrence of the vortex breakdown is the reason for the stall. The dynamic characteristics of lift, drag, and pitching moment in their pitching motions drew hysteresis loops around the static results with an angle of attack. The aerodynamic performances with the low frequency pitching of 0.5 Hz approaches closer to the static ones than the results of the high pitching, 1.0 Hz. It is based on the fact that the airflow around the biplane cannot follow immediately the motion of the biplane. Furthermore, the longitudinal static stability of the three biplanes became worse in the higher pitching motion.

Original languageEnglish
Title of host publication27th Congress of the International Council of the Aeronautical Sciences 2010, ICAS 2010
Pages1491-1450
Number of pages42
Publication statusPublished - 2010 Dec 1
Event27th Congress of the International Council of the Aeronautical Sciences 2010, ICAS 2010 - Nice, France
Duration: 2010 Sep 192010 Sep 24

Publication series

Name27th Congress of the International Council of the Aeronautical Sciences 2010, ICAS 2010
Volume2

Other

Other27th Congress of the International Council of the Aeronautical Sciences 2010, ICAS 2010
CountryFrance
CityNice
Period10/9/1910/9/24

Keywords

  • Aerodynamics
  • Low speed characteristics
  • Supersonic biplane
  • Wind tunnel

ASJC Scopus subject areas

  • Aerospace Engineering
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Materials Science(all)

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