Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-21T02:19:19.418Z Has data issue: false hasContentIssue false
  • English
  • Français

The unsteady pressure field of a ducted impeller

Published online by Cambridge University Press:  19 April 2006

Dac Q. Dang  and
D. H. Norrie
Dac Q. Dang
Affiliation:
Department of Mechanical Engineering, University of Calgary, Canada T2N 1N4
D. H. Norrie
Affiliation:
Department of Mechanical Engineering, University of Calgary, Canada T2N 1N4
Get access Rights & Permissions [Opens in a new window]

Abstract

Analyses based on a three-dimensional vortex-filament model are presented for the unsteady pressure field generated by a ducted propeller. An oscillating part is identified in the kernels and absolute terms of the governing equations for the harmonic components, allowing two methods to be developed for the solution of the higher harmonics. The first method is exact and is applicable to ducted propellers with practical configurations (small chord-to-diameter ratio) while the second is approximate but more suitable for ducted systems with large chord-to-diameter ratios. The second method was applied to a configuration for which experimental data were available and good agreement was obtained for pressure harmonic amplitudes downstream of the propeller and for phase angles upstream of the propeller.

Special consideration was given to the Kutta-Joukowski condition at the duct trailing edge and a general constraint developed for the doubly coupled governing integral equations.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 90 , Issue 2 , 29 January 1979 , pp. 209 - 226
Copyright
© 1979 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Burnell, J. A. & Sacks, A. H. 1962 Ducted propellers - a critical review of the state of the art. Prog. Aero. Sci. 3, 85–135.Google Scholar
Dang, D. Q. 1972 A perturbation method for the solution of singular integral equations. Univ. Calgary, Mech. Engng Dept. Rep. no. 36.Google Scholar
Dang, D. Q. 1973 The calculation of a certain class of Fourier integrals. Univ. Calgary, Mech. Engng Dept. Rep. no. 43.Google Scholar
Dang, D. Q. 1975a Fluctuating pressure field of a ducted propeller. Ph.D. thesis, Mech. Engng Dept., University of Calgary.
Dang, D. Q. 1975b General solution of singular integral equations. Univ. Calgary, Mech. Engng Dept. Rep. no. 67.Google Scholar
Dang, D. Q. & Norrie, D. H. 1975 The fluctuating pressure field of a ducted impeller. Univ. Calgary, Mech. Engng Dept. Rep. no. 66.Google Scholar
Hale, M. R. 1966 Hydrojet ducted propulsion system - impeller induced vibratory pressures and performance characteristics. Ph.D. thesis, Mech. Engng Dept., University of Adelaide.
Hale, M. R. & Norrie, D. H. 1966 Hydrojet ducted propulsion system - impeller induced vibratory pressures and performance characteristics. Univ. Adelaide, Mech. Engng Dept. Rep. no. R66/3.Google Scholar
Morgan, W. G. & Caster, E. B. 1968 Comparison of theory and experiment on ducted propellers. Proc. 7th Symp. Naval Hydrodyn.
Norrie, D. H. & Hale, M. R. 1968 The fluctuating pressure field of a ducted impeller. Proc. A.S.M.E. Symp. Pumping Machinery for Marine Propulsion, Philadelphia.
Ordway, D. E. & Greenberg, M. D. 1961 General harmonic solutions for the ducted propeller. Therm. Adv. Res., Ithaca, Rep. TAR-TR 613.Google Scholar
Ordway, D. E., Sluyter, M. M. & Sonnerup, B. O. U. 1960 Three dimensional theory of ducted impellers. Therm. Adv. Res., Ithaca, Rep. TAR-TR 602.Google Scholar
Weissinger, J. & Maass, D. 1968 The theory of the ducted propeller - a review. Proc. 7th Symp. Naval Hydrodyn.