34th European Rotorcraft Forum 2008
(ERF34)
Liverpool, United Kingdom
16-19 September 2008
Volume 1 of 3
ISBN: 978-1-61782-199-8 Printed from e-media with permission by:
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Copyright© (2008) by Royal Aeronautical Society All rights reserved.
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Curran Associates, Inc. 57 Morehouse Lane Red Hook, NY 12571 USA Phone: 845-758-0400 Fax: 845-758-2634 Email: [email protected] Web: www.proceedings.com TABLE OF CONTENTS
VOLUME 1
SESSION 1
PARALLEL SESSION A - SAFETY
The European Helicopter Safety Team (EHEST): European Partnership for Improving Helicopter Safety ...... 1 M. Masson, M. Van Hijum, A. Healey, J. Vincent, A. Evans
PARALLEL SESSION B - AERODYNAMICS
Rotorcraft Simulations Using a Sliding-grid Approach ...... 47 O. J. Boelens, H. Van Der Ven, J. C. Kok, B. B. Prananta
Higher-Order Accurate Simulations of Blade-Vortex Interaction Using a Discontinuous Galerkin Method on Unstructured Meshes ...... 76 Hee Dong Lee, Oh Joon Kwon
PARALLEL SESSION C – FLIGHT MECHANICS
Numerical Flow Simulations past a Bell 412 Helicopter in Real-Time Hover, Low and High Forward Speed Flight Conditions Using Chimera Grid Technique...... 91 F. Zhang, H. Xu, N. G. Ball, A. W. Gubbels
Chinook Helicopter and Slung Load Coupled Body Dynamic Simulation ...... 141 K. R. Reddy, T. T. Truong, K. J. Bourne, R. A. Stuckey, N. Blacker
SESSION 2
PARALLEL SESSION A – PILOT COUPLING
Nonlinear Rotorcraft Pilot Coupling Analysis and Anti-windup Design ...... 177 Sebastien Kolb, Pierre-Marie Basset
The Strongly Controlled Helicopter...... 210 Linghai Lu, Gareth Padfield, Michael Jump
PARALLEL SESSION B - AERODYNAMICS
BERP IV Aerodynamics, Performance and Flight Envelope...... 245 Kevin Robinson, Alan Brocklehurst
Conservation Issues for RANS-Based Rotor Aeroelastic Simulations ...... 253 Marilyn J. Smith
PARALLEL SESSION C – FLIGHT MECHANICS
Rotary Wing UAV: HIL Tests for a Model-based Feedforward Controller...... 295 Filippo Zanetti, Stefano Colautti, Gian Marco Saggiani, Veronica Rossi
Linear Models for Integrated Flight and Rotor Control...... 333 J. V. R. Prasad, F. E. Olcer, L. N. Sankar, C. He
SESSION 3
PARALLEL SESSION A - ACOUSTICS
Influence of Vortex Models on the Prediction of 2D Airfoil Vortex Interaction ...... 360 S. Loiodice, D. Drikakis, A. Kokkalis
Aeroacoustic Analysis of Main Rotor – Tail Rotor Interaction ...... 370 Timothy M. Fletcher, Karthikeyan Duraisamy, Richard E. Brown
Aeroacoustic Flight Test Data Analysis and Guidelines for Noise-Abatement-Procedure Design and Piloting...... 383 Pierre Spiegel, Frederic Guntzer, Anne Le Duc, Heino Bucholz
PARALLEL SESSION B - AERODYNAMICS
A Two-Grid Overset Method for the Prediction of Isolated Rotor Hover Performance ...... 449 Marvin A. Moulton, Mahendra J. Bhagwat, Francis X. Caradonna
Computational Analysis of Rotor-fuselage Interactional Aerodynamics Using Sliding-plane CFD Method...... 484 R. Steijl, G. Barakos
Blade-vortex Interaction Capture by CFD...... 500 T. Renaud, G. Perez, C. Benoit, G. Jeanfaivre, S. Péron
High Resolution Computation of the Aerodynamics and Acoustics of Blade Vortex Interaction...... 531 Alasdair Thom, Karthikeyan Duraisamy
PARALLEL SESSION C – OPERATIONAL ASPECTS
Helicopter IFR Steep and Curved Approaches Using SBAS Guidance ...... 545 Thomas Lüken, Ernst Groll, Florian Antrack, Bernd Korn
Relevant Aspects of Helicopter-Ship Operations ...... 578 A. Hoencamp, Th. Van Holten, J. V. R. Prasad
Study of a Downwash Caused by a Hovering Rotor in Ground Effect ...... 589 Yasutada Tanabe, Shigeru Saito, Naoko Ooyama, Katsumi Hiraoka
DLR - Onera Common Research Programme for Rotorcraft ...... 600 Blanche Demaret, Klausdieter Pahlke
SESSION 4
PARALLEL SESSION A – ROTORCRAFT-PILOT COUPLINGS
Adverse Rotorcraft-Pilot Coupling: Recent Research Activities in Europe ...... 644 Oliver Dieterich, Joachim Gotz, Binh Dang Vu, Henk Haverdings, Pierangelo Masarati, Marilena Pavel, Michael Jump, Massimo Gennaretti
Adverse Rotorcraft-Pilot Couplings - Prediction and Suppression of Rigid Body RPC Sketches from the Work of Garteur HC-AG16...... 693 Marilena D. Pavel, Binh Dang Vu, Joachim Gotz, Michael Jump, Oliver Dieterich
Adverse Rotorcraft-Pilot Coupling: Test Campaign Development at the University of Liverpool ...... 740 M. Jump, S. Hodge, B. Dang Vu, P. Masarati, G. Quaranta, M. Mattaboni, M. D. Pavel, O. Dieterich
PARALLEL SESSION B - AERODYNAMICS
Computational Analysis of Orthogonal Blade Vortex Interaction ...... 787 Antonio Filippone
Comparison of Finite-State Dynamic Stall Theory with Unsteady Data...... 797 Loren A. Ahaus, David A. Peters
CFD For Tail Rotor Design and Evaluation...... 846 Alan Brocklehurst, René Steijl, George Barakos
PARALLEL SESSION C – STRUCTURES & MATERIALS
Remote Synthesis of Loads on Helicopter Rotating Components using Linear Regression, Load Path and Statistical Analyses...... 867 Xiaobo Yu, Callum Wright, Manfred Heller
VOLUME 2
Robust Optimal Design of Composite Helicopter Rotor Blade Cross Section...... 915 Senthil Murugan, Ranjan Ganguli, Dineshkumar Harursampath
SESSION 5
PARALLEL SESSION A - TESTING
Evaluation of a Steep Curved Rotorcraft IFR Procedure in a Helicopter-ATC Integrated Simulation Test...... 946 Henk Haverdings
The Development of 4-blades New Rotor System for an Unmanned Helicopter with 100kg-class MTOW ...... 987 Deog-Kwan Kim, Keun-Woong Song, Ki-Hoon Chung, Young-Jung Kee, Sung-Ho Kim
PARALLEL SESSION B - AERODYNAMICS
An Approximate Unsteady Aerodynamic Model for Flapped Airfoils Including Improved Drag Predictions...... 1037 Li Liu, Peretz P. Friedmann, Ashwani K. Padthe
High-order Simulation of a Rotor in Forward Flight Using a Four-dimensional Adaptive Flow Solver...... 1082 H. Van Der Ven, O. J. Boelens
Transition Modelling for Rotorcraft CFD...... 1123 Georgios Zografakis, George Barakos, Mark Johnson
PARALLEL SESSION C – FLIGHT MECHANICS
A New Pilot Model for the Assessment of Rotorcraft Handling Qualities ...... 1170 David Reid, Roy Bradley
Demonstration of an Active Sidestick in the DLR Flying Helicopter Simulator (FHS)...... 1174 Max Abildgaard, Wolfgang Von Grunhagen
SESSION 6
PARALLEL SESSION A - DYNAMICS
Helicopter Rotor Load Prediction Using a Geometrically Exact Beam Theory with Multibody Dynamics ...... 1211 S. R. Viswamurthy, Sang Chul Park, Sang Joon Shin
Towards a New Generation of Rotorcraft Comprehensive Analysis: Coupling with CSM and CFD ...... 1254 Biel Ortun, Didier Petot, Khiem-Van Truong, Roger Ohayon
PARALLEL SESSION B - SAFETY
A Numerical-experimental Comparative Analysis of Water Impact Behaviour of Skin Panels Under Different Impact Conditions...... 1287 Edoardo Francesconi, Marco Anghileri, Michele Pittofrati, Luigi-M L Castelletti
Cockpit Image Recording Systems...... 1298 Alan Barclay
Elevated City Helipads: Safety and Design ...... 1330 Alex De Voogt
PARALLEL SESSION C - ACOUSTICS
Prediction of the Effect of Nonlinear Propagation Distortion in Blade Vortex Interaction Noise ...... 1336 Penelope Menounou, Panagiotis Vitsas
Actively Controlled Rotor: Aerodynamic and Acoustic Benefit for the Helicopter Today and Tomorrow...... 1373 A. Altmikus, A. Dummel, R. Heger, D. Schimke
Effect of Computation Parameters on BVI Noise Prediction Using HART II Motion Data ...... 1421 Choongmo Yang, Takashi Aoyama
SESSION 7
PARALLEL SESSION A - DYNAMICS
Coupled CFD/CSD Analysis of a Hovering Rotor Using High Fidelity Unsteady Aerodynamics and a Geometrically Exact Rotor Blade Analysis...... 1461 Hyun-Ku Lee, Sung-Hwan Yoon, Sangjoon Shin, Chongam Kim
Stability Prediction in Tiltrotor Aircraft Including Rotor-Wing Aerodynamic Interaction...... 1476 Taeseong Kim, Sangjoon Shin, Do-Hyung Kim
Vibratory Loads Reduction Analysis of Active Trailing-edge Flap Blades Utilizing Piezoelectric Buckling Actuators ...... 1526 Jae-Sang Park, Sung-Nam Jung, Yung-Hoon Yu
Aeroelastic and Biodynamic Modelling for Stability Analysis of Rotorcraft-Pilot Coupling Phenomena ...... 1572 J. Sarafini, M. Gennaretti, P. Masarati, G. Quaranta, O. Dieterich
PARALLEL SESSION B - SAFETY
Improved Occupant Crash Safety in Helicopters ...... 1608 Marius Lutzenburger
TCAS II Helicopters - Breaking the Myth...... 1671 Derek Whatling, Mark Prior
A Human Factors Analysis of Rotorcraft Accidents in the U.S...... 1711 Bert Boquet, Sacha Duff
PARALLEL SESSION C – AICRAFT DESIGN
Numerical Analysis of Advanced-innovative Tiltrotor Configurations ...... 1748 Alessandro Scandroglio, Andrea D'Andrea, Stefano Melone
Performance of a Hopping Rotochute...... 1781 E. Beyer, M. Costello
VOLUME 3
Robust Design Optimization of Coaxial Rotor for UAV Application Considering Operational Uncertainty...... 1798 Sangook Jun, Kwanjung Yee, Jaewon Lee, Dong-Ho Lee
The S-61/Sea King with Carson Composite Blades Part 1 ...... 1838 H. C. Curtiss, Frank Carson, Adrian Neve
SESSION 8
PARALLEL SESSION A – AIRCRAFT DESIGN
Analysis and Conceptual Design of a Novel MAV Rotorcraft ...... 1876 Alexander Hall, K. C. Wong, Doug Auld
Exploiting Successfully Demonstrated Rotor Technologies ...... 1917 Simon Ransom
PARALLEL SESSION C – FLIGHT MECHANICS
Validation of the SDRE Controller for Rotorcraft Trajectory Tracking Problems...... 1952 Chang Deok Yang, Jeong Hwan Lee, Chang-Joo Kim
An Investigation of Ship Airwake Phenomena Using Time-accurate CFD and Piloted Helicopter Flight Simulation ...... 1961 James S. Forrest, Steven J. Hodge, Ieuan Owen, Gareth D. Padfield
On the Level of Center of Gravity Modeling Error in Neural Network Based Adaptive Controller Design ...... 1972 Onur Tarimci, Deniz Yilmaz, Ilkay Yavrucuk
SESSION 9
PARALLEL SESSION A - DYNAMICS
SHARCS: Hybrid Control Concept for Vibration Reduction of Helicopters...... 2020 Fatma Demet Ulker, Andrei Mander, Daniel Feszty, Fred Nitzsche
Correlation of Helicopter Rotor Aeroelastic Response with HART-II Wind Tunnel Test Data...... 2053 A. Arun Kumar, S. R. Viswamurthy, Ranjan Ganguli
Combined Action of Variable-Stiffness Devices and Trailing-Edge Flap for Helicopter Hub Loads Reduction...... 2072 M. Gennaretti, M. Molica Colella, J. Serafini, G. Bernardini
PARALLEL SESSION B - AERODYNAMICS
Aerodynamic Investigations on a Helicopter Fuselage with Rotor Hub ...... 2093 F. Vogel, C. Breitsamter, N. A. Adams
PARALLEL SESSION C – FLIGHT MECHANICS
Flight Handling Qualities of a Large Compound Rotorcraft...... 2122 Ben Lawrence, Neil Cameron, Stephen Kendrick
Trajectory Optimization Strategies for the Simulation of the ADS-33 Mission Task Elements ...... 2144 C. L. Bottasso, F. Scorcelletti, G. Maisano, A. Ragazzi
Parametric Investigations of Blade-Vortex Interaction using Large-Eddy Simulation...... 2187 Marcel Ilie, Fred Nitzsche, Edgar Matida
SESSION 10
PARALLEL SESSION A - DYNAMICS
Effect of Pretwist on Aeroelastic Response of a Rotor System with Dynamic Stall and Dynamic Wake...... 2197 V. Laxman, C. Venkatesan
Active Control of Helicopter's Gearbox Vibrations and Effects on the Cabin Noise...... 2297 Walter Corbetta, Edoardo Vigoni, Alessandro Toso, Gian Luca Ghiringhelli, Lorenzo Dozio, Fausto Cenedese
Effects of Nonlinearities on Ground Resonance Instability ...... 2327 Giulio Avanzini, Guido De Matteis
PARALLEL SESSION B - AERODYNAMICS
Turbulence Measurements in Blade Tip Vortices Using Dual-Plane Particle Image Velocimetry...... 2379 Bradley Johnson, Manikandan Ramasamy, J. Gordon Leishman
The Effect of Helicopter Configuration on the Fluid Dynamics of Brownout ...... 2398 Catriona Phillips, Richard E. Brown
Predicting the Wake Structure of the HART II Rotor using the Vorticity Transport Model...... 2427 Mary E. Kelly, Richard E. Brown
PARALLEL SESSION C – FLIGHT MECHANICS
Methods for Real-Time Rotor Stall Detection...... 2443 Ivan Grill, Manuj Dhingra, J. V. R. Prasad
In-flight Estimation of Helicopter Gross Weight and Mass Center Location...... 2482 M. Abraham, M. Costello
Helicopter Optimal Control in OEI Low Speed Flights ...... 2528 Przemyslaw Bibik, Janusz Narkiewicz
SESSION 11
PARALLEL SESSION A – AIRCRAFT SYSTEMS
Efficient Numerical Approaches for On-Board Rotorcraft Flight Performance Modeling ...... 2563 Norman E. Suhs, Charles Williams, Ronald Craft
Practical Prognostics for Helicopter CBM ...... 2597 Kenneth Pipe
PARALLEL SESSION B – AIRCRAFT DESIGN
Blade Shape Optimization for HSI Noise Reduction and Performance Improvement of Helicopter...... 2610 Sanghyun Chae, Kwanjung Yee, Choongmo Yang, Takashi Aoyama, Shinkyu Jeong, Shigeru Obayashi
Small Tiltrotor UAV Development and Conversion Flight Test...... 2653 Seong-Wook Choi, Youngshin Kang, Sungho Chang, Samok Koo, Jai Moo Kim
Author Index