Hostname: page-component-5b777bbd6c-gcwzt Total loading time: 0 Render date: 2025-06-23T05:08:55.079Z Has data issue: false hasContentIssue false
  • English
  • Français

Stagnation Pressure Changes in Unsteady Flow

Published online by Cambridge University Press:  07 June 2016

J. H. Horlock  and
H. Daneshyar
J. H. Horlock
Affiliation:
Cambridge University, Engineering Laboratory
H. Daneshyar
Affiliation:
Cambridge University, Engineering Laboratory
Get access

Summary

The changes in stagnation pressure produced by movement of rows, arrays and sheets of vortices are derived. By applying Preston’s result for a single row of moving vortices to continuous vortex sheets, the time mean stagnation pressure downstream of a row of blades with fluctuating circulation is derived. It is shown that if the blade circulation varies due to the potential flow fields of the neighbouring blades then the time mean stagnation pressure may change with location.

Type
Research Article
Information
Aeronautical Quarterly , Volume 22 , Issue 3 , August 1971 , pp. 207 - 224
Copyright
Copyright © Royal Aeronautical Society. 1971

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.)

Article purchase

Temporarily unavailable

References

1. Preston, J. H. The non-steady flow of an inviscid, incompressible fluid, with special reference to changes in total pressure through flow machines. Aeronautical Quarterly, Vol. XII, Part 4, November 1961.Google Scholar
2. Dean, R. C. Jr. On the necessity of unsteady flow in turbo-machines. Journal of Basic Engineering, Transactions of the American Society of Mechanical Engineers, Series D, pp. 24-28, March 1959.CrossRefGoogle Scholar
3. Eck, B. Technische Stromungslehre. Springer, Berlin, p. 50, 1957.CrossRefGoogle Scholar
4. Pai, S. I. Introduction to the theory of compressible flow, van Nostrand, p. 73, 1959.Google Scholar
5. Kemp, N. H., and Sears, W. R. Aerodynamic interference between moving blade rows. Journal of the Aeronautical Sciences, Vol. 20, No. 9, September 1953.CrossRefGoogle Scholar
6. Lamb, H. Hydrodynamics. 6th edition. Cambridge University Press, 1932.Google Scholar
7. Horlock, J. H. Unsteady flow in turbo-machines. Third Australasian Conference on Hydraulics and Fluid Mechanics, Paper No. 2674, Sydney, November 1965.Google Scholar
8. Kemp, N. H. and Sears, W. R. The unsteady forces due to viscous wakes in turbo-machines. Journal of the Aeronautical Sciences, Vol. 22, No. 7, July 1955.CrossRefGoogle Scholar
9. Hawthorne, W. R. The flow through moving cascades with fluctuating lift—the use of generalised functions. Private communication, July 1969.Google Scholar
10. Lighthill, M. J. Introduction to Fourier analysis and generalised functions. Cambridge University Press, 1958.CrossRefGoogle Scholar
11. Sears, W. R. Some aspects of non-stationary airfoil theory and its practical applications. Journal of the Aeronautical Sciences, Vol. 8, 1941.CrossRefGoogle Scholar