Journal ArticleDOI
Proposed relationship between broadband shock associated noise and screech tones
TLDR
In this paper, the relationship between broadband shock associated noise and screech tones is examined and it is shown that from the spectral characteristics point of view, the screech tone may be regarded as a special case of broadband wave associated noise.About:
This article is published in Journal of Sound and Vibration.The article was published on 1986-10-22. It has received 294 citations till now. The article focuses on the topics: Noise (radio) & Shock (fluid dynamics).read more
Citations
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Journal ArticleDOI
On the three families of instability waves of high-speed jets
Christopher K. W. Tam,Fang Q. Hu +1 more
TL;DR: In this article, an analytical and computational study of the normal-mode small-amplitude waves of high-speed jets is presented, and three families of instability waves have been identified: (1) the familiar Kelvin-Helmholtz instability waves, (2) supersonic instability waves; and (3) subsonic waves.
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Supersonic Jet Screech: Half-century from Powell to the Present
TL;DR: A detailed overview of the state of the art in the field of supersonic jet screech can be found in this paper, including a historical perspective, a summary of recent developments and a critical assessment of the current state-of-the-art.
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Unstructured Large-Eddy Simulations of Supersonic Jets
TL;DR: In this paper, experience gained from previous jet noise studies with the unstructured large-eddy simulation flow solver "Charles" is summarized and put to practice for the predictions of supersonic jets issued f...
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Stochastic model theory of broadband shock associated noise from supersonic jets
TL;DR: In this paper, a method based on the work of Tam and Tanna (1982) for calculating the near field noise spectrum and the spatial distribution of broadband shock associated noise from supersonic jets is proposed.
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The shock-cell structures and screech tone frequencies of rectangular and non-axisymmetric supersonic jets
TL;DR: In this article, the authors developed a linear shock cell model for non-axisymmetric supersonic jets from convergent-divergent nozzles operating at off-design conditions, where the mixing layer of the jet is approximated by a vortex sheet.
References
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Journal ArticleDOI
On the Mechanism of Choked Jet Noise
TL;DR: In this paper, the authors examined the noise in two-dimensional flow with the aid of a dynamic Schlieren apparatus, verifying the suggested mechanism and showing the similarity to axially symmetric flow where discontinuities in frequency, partly analogous to edge tones, occur.
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Shock associated noise of supersonic jets from convergent-divergent nozzles
Christopher K. W. Tam,H.K. Tanna +1 more
TL;DR: In this article, the authors derived a scaling formula that the intensity of shock associated noise varies as (Mj2 − Md2)2 where Mj and Md are the fully expanded jet operating Mach number and nozzle design Mach number, respectively.
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Sound generated by instability waves of supersonic flows. Part 2. Axisymmetric jets
TL;DR: In this paper, a solution describing the spatial evolution of small-amplitude instability waves and their associated sound field of axisymmetric supersonic jets is found using the method of matched asymptotic expansions (see Part 1, Tam & Burton 1984).
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Experiments on the flow and acoustic properties of a moderate-Reynolds-number supersonic jet
TL;DR: In this article, the authors studied the flow and acoustic properties of a jet at Reynolds number of 70,000 at Mach 2.1 with pitot tubes and hot-wire anemometry.
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An experimental study of jet noise part II: Shock associated noise
TL;DR: In this article, the authors measured the noise from a convergent nozzle operated over an extensive envelope of supercritical jet operating conditions and compared the results with the spectra predicted by an existing theoretical model, and good agreement was obtained in most cases.