Fluidlastic absorbers for lagwise loads reduction of rotor blades

Dong Han, Edward Smith

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

Abstract

To reduce the troublesome second harmonic lagwise load in stiff in-plane rotor blades, tuned fluidlastic absorbers are proposed to be embedded in the blade cavity. The aeroelastic simulation of the coupled blade and fluidlastic absorber system is based on the generalized force formulation. The results indicate that placing an embedded fluidlastic absorber in the blade chordwise direction can reduce the second harmonic lagwise root bending moment by more than 85% at different steady flight states, which means fluidlastic absorbers are an effective means to control this load. The corresponding stroke of the absorber is limited within 2% blade chord length. Increasing tuning port area ratio is an effective means to reduce the stroke with relatively small influence on the performance of the absorber. The effects of the tuning frequency of the absorber, the damping, initial position, forward speed, and flight altitude on the performance of the absorber are also studied.

Original languageEnglish (US)
Title of host publicationAmerican Helicopter Society International - 2nd Asian/Australian Rotorcraft Forum, ARF 2013 and the 4th International Basic Research Conference on Rotorcraft Technology 2013, IBRCRT 2013
PublisherAmerican Helicopter Society International
Pages201-213
Number of pages13
ISBN (Print)9781632662828
StatePublished - Jan 1 2013
Event2nd Asian/Australian Rotorcraft Forum, ARF 2013 and the 4th International Basic Research Conference on Rotorcraft Technology 2013, IBRCRT 2013 - Tianjin, China
Duration: Sep 8 2013Sep 11 2013

Other

Other2nd Asian/Australian Rotorcraft Forum, ARF 2013 and the 4th International Basic Research Conference on Rotorcraft Technology 2013, IBRCRT 2013
CountryChina
CityTianjin
Period9/8/139/11/13

Fingerprint

Turbomachine blades
Tuning
Rotors
Bending moments
Damping

All Science Journal Classification (ASJC) codes

  • Automotive Engineering

Cite this

Han, D., & Smith, E. (2013). Fluidlastic absorbers for lagwise loads reduction of rotor blades. In American Helicopter Society International - 2nd Asian/Australian Rotorcraft Forum, ARF 2013 and the 4th International Basic Research Conference on Rotorcraft Technology 2013, IBRCRT 2013 (pp. 201-213). American Helicopter Society International.
Han, Dong ; Smith, Edward. / Fluidlastic absorbers for lagwise loads reduction of rotor blades. American Helicopter Society International - 2nd Asian/Australian Rotorcraft Forum, ARF 2013 and the 4th International Basic Research Conference on Rotorcraft Technology 2013, IBRCRT 2013. American Helicopter Society International, 2013. pp. 201-213
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title = "Fluidlastic absorbers for lagwise loads reduction of rotor blades",
abstract = "To reduce the troublesome second harmonic lagwise load in stiff in-plane rotor blades, tuned fluidlastic absorbers are proposed to be embedded in the blade cavity. The aeroelastic simulation of the coupled blade and fluidlastic absorber system is based on the generalized force formulation. The results indicate that placing an embedded fluidlastic absorber in the blade chordwise direction can reduce the second harmonic lagwise root bending moment by more than 85{\%} at different steady flight states, which means fluidlastic absorbers are an effective means to control this load. The corresponding stroke of the absorber is limited within 2{\%} blade chord length. Increasing tuning port area ratio is an effective means to reduce the stroke with relatively small influence on the performance of the absorber. The effects of the tuning frequency of the absorber, the damping, initial position, forward speed, and flight altitude on the performance of the absorber are also studied.",
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Han, D & Smith, E 2013, Fluidlastic absorbers for lagwise loads reduction of rotor blades. in American Helicopter Society International - 2nd Asian/Australian Rotorcraft Forum, ARF 2013 and the 4th International Basic Research Conference on Rotorcraft Technology 2013, IBRCRT 2013. American Helicopter Society International, pp. 201-213, 2nd Asian/Australian Rotorcraft Forum, ARF 2013 and the 4th International Basic Research Conference on Rotorcraft Technology 2013, IBRCRT 2013, Tianjin, China, 9/8/13.

Fluidlastic absorbers for lagwise loads reduction of rotor blades. / Han, Dong; Smith, Edward.

American Helicopter Society International - 2nd Asian/Australian Rotorcraft Forum, ARF 2013 and the 4th International Basic Research Conference on Rotorcraft Technology 2013, IBRCRT 2013. American Helicopter Society International, 2013. p. 201-213.

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

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Han D, Smith E. Fluidlastic absorbers for lagwise loads reduction of rotor blades. In American Helicopter Society International - 2nd Asian/Australian Rotorcraft Forum, ARF 2013 and the 4th International Basic Research Conference on Rotorcraft Technology 2013, IBRCRT 2013. American Helicopter Society International. 2013. p. 201-213