Acoustic Simulation of Hot Jets Issuing from a Rectangular Hypersonic Nozzle

Acoustic simulation of hot jets issuing from a rectangular hypersonic nozzle was carried out. The aim of this study is, even though qualitative to some extent, to establish a method capable of predicting the acoustic characteristics of the high-temperature and high-velocity jets issuing from the realistic hypersonic nozzle having a complicated geometry. Two kinds of test nozzles, 2.4% scaled model with afterburner for hot jet experiments and 1.0% scaled model for cold-air/helium mixture jet experiments, were manufactured and tested. By using a high-enthalpy wind-tunnel plant, acoustic characteristics of the hot jets issuing from the rectangular hypersonic nozzle for several representative but realistic high-temperature and high-velocity jet conditions were obtained. At the same time, by using a small anechoic chamber, the acoustic characteristics of the hot jets were duplicated using cold-air/helium mixture jets having the same velocities. Although we have to pay attention to some noted exceptions, the di...

[1]  Christopher K. W. Tam,et al.  Dimensional Analysis of Jet Noise Data , 2005 .

[2]  D. R. Stull,et al.  JANAF Thermochemical Tables. Second Edition , 1971 .

[3]  Krishna Viswanathan,et al.  Improved Method for Prediction of Noise from Single Jets , 2007 .

[4]  Shoji Sakaue,et al.  Mixing Enhancement on the Afterburner with Fuel Injection Struts for Hypersonic Vehicle , 2011 .

[5]  Dennis K. McLaughlin,et al.  Measurements of Supersonic Helium/Air Mixture Jets , 1999 .

[6]  Mikiya Araki,et al.  Thrust Measurement of a Rectangular Hypersonic Nozzle Using an Inclined Baffle Plate , 2012 .

[7]  Hideyuki Taguchi,et al.  Numerical analysis of rectangular plug nozzle considering practical geometry and flow conditions , 2007 .

[8]  Marco Debiasi,et al.  Noise Measurements in Supersonic Jets Treated with the Mach Wave Elimination Method , 1999 .

[9]  Jay P. Gore,et al.  Study of Spectral Noise Emissions from Standard Turbulent Nonpremixed Flames , 2004 .

[10]  Mikiya Araki,et al.  Feasibility of Aerodynamic-Tab Jet Noise Suppressors in a Hypersonic Nozzle at Takeoff , 2012 .

[11]  C. Tam,et al.  Subsonic Jet Noise from Nonaxisymmetric and Tabbed Nozzles , 2000 .

[12]  Motoyuki Hongoh,et al.  Firing Test of a Hypersonic Turbojet Engine Installed on a Flight Test Vehicle , 2009 .

[13]  Katsuyoshi Fukiba,et al.  New Defrosting Method Using Jet Impingement for Precooled Turbojet Engines , 2009 .

[14]  Tetsuya Sato,et al.  Hypersonic Turbojet Engine Design of a Balloon-Based Flight Testing Vehicle , 2008 .

[15]  Tetsuya Sato,et al.  Design and Fabrication of Variable Nozzle for Precooled Turbojet Engine , 2009 .

[16]  Dennis K. McLaughlin,et al.  Acoustic and Mean Flow Measurements of High-Speed, Helium-Air Mixture Jets , 2003 .

[17]  Dimitri Papamoschou,et al.  Analytical Predictions and Measurements of the Noise Radiated from Supersonic Coaxial Jets , 2000 .

[18]  K. Viswanathan.  Aeroacoustics of hot jets , 2002, Journal of Fluid Mechanics.

[19]  Thomas Sattelmayer,et al.  A spectral model for the sound pressure from turbulent premixed combustion , 2007 .

[20]  Tetsuya Sato,et al.  Design study of hypersonic components for precooled turbojet engine , 2008 .

[21]  Dimitri Papamoschou,et al.  Acoustic Simulation of Coaxial Hot Air Jets Using Cold Helium-Air Mixture Jets , 2007 .

[22]  C. Tam,et al.  The sources of jet noise: experimental evidence , 2007, Journal of Fluid Mechanics.

[23]  C. L. Morfey,et al.  New scaling laws for hot and cold jet mixing noise based on a geometric acoustics model , 1977 .

[24]  J. Gore,et al.  An experimental study of partially premixed flame sound , 2005 .

[25]  J. Seiner,et al.  On the Two Components of Turbulent Mixing Noise from Supersonic Jets , 1996 .

[26]  Mikiya Araki,et al.  Mean-Flow and Acoustic Characteristics of Cold Jets from a Rectangular Hypersonic Nozzle , 2014 .

[27]  Krishna Viswanathan,et al.  Instrumentation Considerations for Accurate Jet Noise Measurements , 2006 .