Back to Search
Start Over
Effects of the Helmholtz Resonator on the Hartmann Whistle Operating at a High Nozzle Pressure Ratio
- Source :
- Journal of Applied Mechanics and Technical Physics. 60:989-995
- Publication Year :
- 2019
- Publisher :
- Pleiades Publishing Ltd, 2019.
-
Abstract
- A numerical simulation is carried out to investigate the effect of the Helmholtz resonator capacity on the Hartmann whistle operating at high values of the nozzle pressure ratio using the turbulence model. The results of the present numerical simulations are compared to experimental data. The simulation results show that the frequency and amplitude of the Hartmann whistle with the Helmholtz resonator are obviously lower as compared to the conventional Hartmann whistle. Moreover, the Mach number contours and streamlines indicate that the Helmholtz resonator does not affect the shock-cell structure between the nozzle and the cavity, and the Hartmann whistle with the Helmholtz resonator has a. jet regurgitant mode that is different from the Hartmann whistle with a. straight resonator. The diameter of the Helmholtz resonator is an important factor affecting the fundamental frequency.
- Subjects :
- Physics
Jet (fluid)
Turbulence
Mechanical Engineering
Acoustics
Nozzle
Astrophysics::Instrumentation and Methods for Astrophysics
Fundamental frequency
Condensed Matter Physics
law.invention
Physics::Fluid Dynamics
symbols.namesake
Resonator
Mach number
Mechanics of Materials
law
symbols
Streamlines, streaklines, and pathlines
Helmholtz resonator
Subjects
Details
- ISSN :
- 15738620 and 00218944
- Volume :
- 60
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Mechanics and Technical Physics
- Accession number :
- edsair.doi...........a459efd44e28bb53f7b5c5939fd570bb