Results 91 to 100 of about 45,161 (201)

A study of the variable impedance surface concept as a means for reducing noise from jet interaction with deployed lift-augmenting flaps [PDF]

The feasibility of quieting the externally-blown-flap (EBF) noise sources which are due to interaction of jet exhaust flow with deployed flaps was demonstrated on a 1/15-scale 3-flap EBF model.
Chanaud, R. C., Hayden, R. E., Kadman, Y.   +2 more
core   +1 more source

Microgravity acoustic mixing for particle cloud combustors [PDF]

Experimental and theoretical investigations of acoustic mixing procedures designed to uniformly distribute fuel particles in a combustion tube for application in the proposed Particle Cloud Combustion Experiment (PCCE) are described.
Pla, Frederic, Rubinstein, Robert I.
core   +1 more source

The transfer of technology to measure skin burn depth in humans [PDF]

Discussed here is the use of ultrasonic techniques originally used to locate cracks in metal structues to measure burn wound depth in humans. Acoustic impedance, performance tests, and the theoretical model are discussed.
Cantrell, John H., Yost, William T.
core   +1 more source

Analytical and experimental studies of an optimum multisegment phased liner noise suppression concept [PDF]

Results are presented from detailed analytical studies made to define methods for obtaining improved multisegment lining performance by taking advantage of relative placement of each lining segment.
Beckemeyer, R. J., Patterson, J. D., Sawdy, D. T.   +2 more
core   +1 more source

Impact of staining on cell acoustic properties. [PDF]

Biophys J
Wang Q, Verma T, Edthofer A, Baasch T, Laurell T, Sand KK, Lenshof A, Qiu W.   +7 more
europepmc   +1 more source

Turbofan aft duct suppressor study [PDF]

Suppressions due to acoustic treatment in the annular exhaust duct of a model fan were theoretically predicted and compared with measured suppressions. The predictions are based on the modal analysis of sound propagation in a straight annular flow duct ...
Fiske, G. H., Joshi, M. C., Kraft, R. E., Motsinger, R. E., Syed, A. A.   +4 more
core   +1 more source

Effects of forward velocity and acoustic treatment on inlet fan noise [PDF]

Flyover and static noise data from several engines are presented that show inlet fan noise measured in flight can be lower than that projected from static tests for some engines. The differences between flight and static measurements appear greatest when
Feiler, C. E., Merriman, J. E.
core   +1 more source

Spatiotemporal acoustic meta-patches for multifactorial wound treatment. [PDF]

Bioact Mater
Wu Z, Gan J, Zhao Y.
europepmc   +1 more source

Moth-Wing-Inspired Multifunctional Metamaterials. [PDF]

Adv Mater
Pei H, Yang H, Zhang N, Li T, Wang X, Zhao M, Ding S, Wang X, Lv Q, Xu Z, Chen Y, Li X, Zhai W.   +12 more
europepmc   +1 more source

Ultrasonic liquid-phase catalysis for enhanced power generation in Al-based bioelectrolyte batteries. [PDF]

Ultrason Sonochem
Huang H, Yin J, Zhang S, Yang Q, Chen Z, Tang Q, Qi X, Su S, Chen J, Chen H, Zhu K, Qu S, Liu P.   +12 more
europepmc   +1 more source