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Correlation study of a rotor in descending flight using DYMORE with a freewake model

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Abstract

In this work, the Blade Vortex Interaction (BVI) airloads characteristic for a rotor in descending flight condition is investigated using a nonlinear flexible multibody dynamics analysis code DYMORE. A free vortex wake model is incorporated into the comprehensive analysis system and improvement of airloads prediction as well as collective and cyclic pitch control settings is obtained over the finite-state dynamic inflow model that is adopted in the conventional DYMORE analysis. The three test conditions in the HART (Higher harmonic control Aeroacoustic Rotor Test) II are considered to illustrate the present investigation. It is found that the BVI airloads characteristic is significantly influenced by the higher harmonic pitch control inputs. The influence of BVI oscillatory peaks along with the miss-distance between the blade and the vortices is studied in detail to identify the mechanism of reducing noise and vibration in the HART II experiment.

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Authors and Affiliations

  1. Department of Aerospace Information Engineering, Konkuk University, Seoul, 143-701, Korea

    Jae-Sang Park, Sung Nam Jung, Soo Hyung Park & Yung Hoon Yu

Authors
  1. Jae-Sang Park
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  2. Sung Nam Jung
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  3. Soo Hyung Park
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  4. Yung Hoon Yu
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Corresponding author

Correspondence to Sung Nam Jung.

Additional information

This paper was recommended for publication in revised form by Associate Editor Yeon June Kang

Jae-Sang Park received Ph.D degree in mechanical and aerospace engineering, from Seoul National University, Seoul, Korea in 2006. From 2006–2007, he worked as a post doctor at Flight Vehicle Research Center, Seoul National University. Dr. Park is currently a research professor at Konkuk University, Seoul, Korea. His research interests include aeroelasticity, rotorcraft aeromechanics using multibody dynamics, and smart structures.

Sung Nam Jung is a professor at the Department of Aerospace Information Engineering in Konkuk University, Seoul, Korea. He received his PhD, MS, and BS degrees from Seoul National University, Seoul, Korea in 1993, 1989, and 1986, respectively. He visited the University of Maryland, College Park in USA as a visiting assistant professor in 1999 and as an adjunct professor at Kaist in 2005. From 1994 to 2006, he worked for Chonbuk National University as a faculty member. He joined the Konkuk University as a full professor in 2006. The areas of interests include rotorcraft dynamics, aeroelasticity, composite structural mechanics, and smart structures and materials.

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Park, JS., Jung, S.N., Park, S.H. et al. Correlation study of a rotor in descending flight using DYMORE with a freewake model. J Mech Sci Technol 24, 1583–1594 (2010). https://doi.org/10.1007/s12206-010-0507-0

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  • DOI: https://doi.org/10.1007/s12206-010-0507-0

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