Resonant gas oscillations in a linear area variation closed cavity are investigated, for two duct cross sections: rectangular and circular. The resonance frequencies were similar for both the ducts. Increased drive amplitude produced higher distortions in the waveform. It was found that both resonators exhibited commensurate behavior. This is opposed to noncommensurate behavior observed in nonuniform circular cross section resonators. The rectangular section duct had higher energy than circular section duct, in second harmonic for the same drive amplitude. The results reveal that in order to achieve shockless high amplitude pressure oscillations in a duct, both nonuniform area variation and circular cross section are required. © 2016 by ASME.

Thiruchengode M. Muruganandam

Department of Aerospace Engineering

Resonators

Circular cross-sections

CONSONANT

NONUNIFORM CAVITY

PRESSURE OSCILLATION

RECTANGULAR SECTION

Resonance frequencies

Second harmonics

WAVEFORM DISTORTIONS

Ducts

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IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Resonant Gas Oscillations in a Linear Area Variation Cavity: Rectangular Versus Circular Cross Section

Journal of Vibration and Acoustics, Transactions of the ASME

Fluidics has the advantage of using no-moving-parts to manage fluid motion. Acoustic compressor/pump has become the latest entry into the field of fluidics as a no-moving-part pumping technology. Despite the advantage of using no-moving-parts, there are only a few acoustic fluidic pumps that have been physically built and tested to date. However, in the acoustics field, there are many acoustic pumps built employing moving-parts rectifiers. The fluidics field can benefit immensely from the recent advances made in acoustic compression technology, while the acoustic field can benefit from the plethora of work that already exists in fluidics. Although researchers have conducted extensive studies on this topic during the last few decades, no single resource lists, examines, combines and infers the immense information about it. This review offers a collective resource, tracing the development of the acoustic compressor/pump from its invention to recent advances, in terms of understanding, prediction, and application. This brief review (a) serves as a literature resource for researchers from various areas (especially from the field of acoustics and fluidics) (b) provides a critical assessment of the state of the art, and (c) provides suggestions for future designs. © 2018 Elsevier B.V.

Sensors and Actuators, A: Physical

A review of acoustic compressors and pumps from fluidics perspective

The Journal of the Acoustical Society of America

Optimal shaping of acoustic resonators for the generation of high-amplitude standing waves

Acta Acustica united with Acustica

On the Optimization of an Acoustic Resonator Shape with Respect to Acoustic Pressure Amplitude

Generation of shock-free pressure waves in shaped resonators by boundary driving

Experiments of high-amplitude and shock-free oscillations of air column in a tube with array of Helmholtz resonators

Effect of resonator dimensions on nonlinear standing waves

Journal	Journal of Vibration and Acoustics, Transactions of the ASME
Publisher	American Society of Mechanical Engineers (ASME)
ISSN	10489002
Open Access	No