Hyeonsoo Yeo |  Wayne Johnson -  《69th American Helicopter Society International Annual Forum 2013 : Volume 1 of 4.》 -  American Helicopter Society International Forum - 2013, - 782～787 - 共6页

摘要：Maximum blade loading capability of a coaxial, lift-offset rotor is investigated using a rotorcraft configuration designed in the context of short-haul, medium-size civil and military missions. The ai...

关键词： Investigation |  Loading |  Rotors

NSTL主题词： Blade loading |  Rotors

Alex M. Moodie |  Hyeonsoo Yeo... -  《69th American Helicopter Society International Annual Forum 2013 : Volume 4 of 4.》 -  American Helicopter Society International Forum - 2013, - 2306～2315 - 共10页

摘要：An advanced single main rotor helicopter concept with active rotor technologies is examined to determine potential performance and efficiency improvements above a baseline helicopter concept. Performa...

关键词： active |  rotor |  technology

NSTL主题词： active control |  System performance |  Helicopters

Khiem-Van Truong |  Hyeonsoo Yeo... -  《Aerospace science and technology》 - 2013,30(1) - 293～305 - 共13页

摘要：This study investigates 1-D and 3-D methods for modeling helicopter rotor blade structural dynamics to better understand the accuracy of current structural modeling based on 1-D beam theory. Natural f...

关键词： Helicopter rotor |  Flexible blade structure |  1-D and 3-D structural modeling |  Blade natural frequencies

Rohit Jain |  Hyeonsoo Yeo -  《Future Vertical Lift Aircraft Design Conference 2012 :》 -  Future Vertical Lift Aircraft Design Conference - 2012, - 380～396 - 共17页

摘要：The effects of variation of blade torsion frequency on rotor performance and structural loads are investigated for a 1/rev active flap rotor and baseline rotor (no active control). The UH-60A four-bla...

关键词： Effects |  Torsion |  Frequencies Rotor

NSTL主题词： Trailing edge flaps |  Structural loads |  torsion

Wayne Johnson |  Alex M. Moodie... -  《Future Vertical Lift Aircraft Design Conference 2012 :》 -  Future Vertical Lift Aircraft Design Conference - 2012, - 156～181 - 共26页

摘要：The design and performance of compound helicopters utilizing lift-offset rotors are examined, in the context of short-haul, medium-size civil and military missions. The analysis tools used are the com...

关键词： Design |  Performance Lift-Offset Rotorcraft

NSTL主题词： Rotary wing aircraft |  Religious Missions

Alex Moodie |  Hyeonsoo Yeo -  《67th American Helicopter Society International Annual Forum 2011. vol. 1》 -  American Helicopter Society International Annual Forum - 2011, - 567～582 - 共16页

摘要：A slowed-rotor compound helicopter is conceptually designed using a multi-fidelity approach, showing the potential for significant efficiency improvements above conventional helicopters. The cruise ti...

关键词： DGW: Design Gross Weight;;FAA: Federal Aviation Administration;;GW: Gross Weight;;HOGE: Hover Out of Ground Effect;;ISA: Int'l Standard Atmosphere;;et al

NSTL主题词： Cruises

Hyeonsoo Yeo |  Ethan A. Romander... -  《Journal of the American Helicopter Society》 - 2011,56(4) - 42006.1～42006.18 - 共18页

摘要：Wind tunnel measurements of performance, loads, and vibration of a full-scale UH-60A Black Hawk main rotor with an individual blade control (IBC) system are compared with calculations obtained using t...

关键词： A: amplitude of individual blade control (IBC) input |  C_L: rotor lift coefficient |  L/ρπ R~2{ΩR)~2 |  C_(Mx): rotor roll moment coefficient |  M_x/ρπR~3{ΩR)~2 |  C_P: rotor power coefficient |  P/ρπ R~2{ΩR)~2 |  C_x: rotor propulsive coefficient |  X/ρπR~2{ΩR)~2

Anubhav Datta |  Hyeonsoo Yeo... -  《67th American Helicopter Society International Annual Forum 2011. vol. 2》 -  American Helicopter Society International Annual Forum - 2011, - 1105～1130 - 共26页

摘要：This paper describes and analyzes the measurements from a full-scale, slowed RPM, UH-60A rotor tested at the National Full-Scale Aerodynamics Complex 40- by 80- ft wind tunnel up to an advance ratio o...

关键词： C_(d,a,h): rotor drag;;nondim. By ρπR~2(ΩR)~2;;C_(l,n,t): rotor thrust;;nondim. By ρπR~2(ΩR)~2;;Cde: effective drag coeff. C_(DE) = (C_(pi) + C_(po))/μ = Cp/μ - C_x C_(de) = —C_x in autorotation;;C_(ho): profile H-force coeff;;C_p: power coeff. = P/ρπ R~2(ΩR)~3 = C_Q C_p = C_(pi) + C_(po) + Μc_x et al

NSTL主题词： Advance ratio |  Comprehension

Hyeonsoo Yeo |  Jeffrey D. Sinsay... -  《Journal of the American Helicopter Society》 - 2010,55(1) - 012010.1～012010.12 - 共12页

摘要：The process of rotor blade area sizing during conceptual design was explored for the design of military and civil heavy lift tiltrotors. The use of the comprehensive rotorcraft analysis CAMRAD II was ...

关键词： A: rotor disk area |  π R~2 |  C_L: wing lift coefficient |  L/(1/2)ρSV~2 |  C_T: rotor thrust coefficient |  T/ρA(ΩR)~2 |  C_w: aircraft weight coefficient |  W/ρA(ΩR)~2 |  FM: hover figure of merit |  et al

Hyeonsoo Yeo |  Khiem-Van Ttuong... -  《51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 2010. Volume 9 of 10》 -  AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - 2010, - 7222～7240 - 共19页

摘要：Comparisons between 1-D and 3-D analyses are conducted systematically for severalproblems ranging from simple isotropic beams to realistic composite blades in order tobetter understand the differences...

关键词： Versus;;Methods;;Dynamics

NSTL主题词： dynamic structural analysis |  Blades |  Three Dimensions |  Modeling