Passive control of pitch-break of a BWB UCAV model using vortex generator

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• 作者：HoJoon Shim (1)
  Seung-O Park (1)
  
  1. Division of Aerospace Engineering ; KAIST ; Daejeon ; 305-701 ; Korea
  
• 关键词：Flow separation ; Flow control ; Wind tunnel ; UCAV ; Vortex generator
• 刊名：Journal of Mechanical Science and Technology
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：29
• 期：3
• 页码：1103-1109
• 全文大小：1,893 KB
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• 刊物类别：Engineering
• 刊物主题：Mechanical Engineering
  Structural Mechanics
  Control Engineering
  Industrial and Production Engineering
  
• 出版者：The Korean Society of Mechanical Engineers
• ISSN：1976-3824

文摘

To examine the effect of vortex generator on pitch-break control for a BWB model having lambda wing configuration, wind tunnel experiments were conducted. Tests were carried out at two freestream velocities of 30 m/s and 60 m/s. Experimental results of the BWB model, which was modified slightly from UCAV 1303, at various angles of attack are presented. Aerodynamic force and moment coefficients and chordwise pressure distributions at several spanwise stations are included. Spanwise location of a vortex generator was selected based on pressure distributions of the BWB model at several angles of attack and through a preliminary test. Well known pitch-break or pitch-up phenomenon was identified to occur at a specific angle of attack for the case without vortex generator. When the vortex generator was installed, this pitch-break was found to be delayed to a much larger angle of attack, which might well be adopted for efficient flight control.