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Kandula, M. (2012) Measurements of Thermal Effects on Acoustic Screech in a Choked Circular Jet Emanating from a Sharp-Edged Orifice. Proceedings of the 23rd International Congress on Theoretical and Applied Mechanics, Beijing, 19-24 August 2012.

has been cited by the following article:

• TITLE: On the Existence of Subharmonic Screech in Choked Circular Jets from a Sharp-Edged Orifice

  AUTHORS: Max Kandula

  KEYWORDS: Subharmonic Screech; Sharp-Edged Orifice; Circular Jets; Thermal Effects

  JOURNAL NAME: Open Journal of Acoustics, Vol.4 No.1, March 21, 2014

  ABSTRACT: Experiments are performed in choked circular hot and cold nitrogen jets issuing from a 2.44 cm diameter sharp-edged orifice at a fully expanded jet Mach number of 1.85 in an effort to investigate the character of screech phenomenon. The stagnation temperature of the cold and the hot jets are 299 K and 319 K respectively. The axial distribution of the centerline Mach number was obtained with a pitot tube, while the screech data (frequency and amplitude) at different axial and radial stations were measured with the aid of microphones. The fundamental screech frequency of the hot jet is slightly increased relative to that of the cold jet. It is concluded that temperature effects on the screech amplitude are manifested with regard to the fundamental and the subharmonic even at relatively small temperature range considered.