Abstract
A study is made of the flow of a viscous, compressible, heat conducting, and perfect gas in slender axisymmetric channels under the adiabatic wall condition. Solutions to the equations of motion for such a gas are obtained using the method of similar solutions. This approach reduces the equations of motion to a pair of coupled nonlinear ordinary differential equations which have relatively simple closed form solutions. It is found that solutions of this type are only possible in channels with divergent walls and a favorable pressure gradient.
In the present investigation it is found that the velocity profiles are insensitive to moderate variations in the Prandtl number and γ, the ratio of specific heats. The temperature profiles, total temperature profiles, and Mach number profiles are however very sensitive to changes in Prandtl number and ratio of specific heats. For a Prandtl number less than unity there is an accumulation of total energy near the channel centerline and a deficit of total energy near the channel walls. The recovery factor is found to be equal to the Prandtl number.
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Abbreviations
- A :
-
area
- c p :
-
specific heat at constant pressure
- d :
-
diameter
- f :
-
dimensionless stream function
- g :
-
dimensionless temperature
- h o :
-
stagnation enthalpy
- k :
-
thermal conductivity
- \(\dot m\) :
-
mass flow rate
- M :
-
Mach number
- n :
-
normal to the wall
- N :
-
constant
- p :
-
pressure
- Pr :
-
Prandtl number
- r :
-
wall radius
- R:
-
recovery factor
- R :
-
gas constant
- Re :
-
Reynolds number
- s :
-
dimensionless temperature function
- T :
-
temperature
- u :
-
axial component of velocity
- v :
-
transverse component of velocity
- V :
-
temperature function
- x :
-
axial coordinate
- y :
-
transverse coordinate
- α :
-
constant
- β :
-
function of ξ
- γ :
-
ratio of specific heats
- η :
-
dimensionless y coordinate
- θ :
-
wall angle
- λ :
-
constant
- μ :
-
viscosity
- ξ :
-
x coordinate
- ρ :
-
density
- χ :
-
constant
- Ψ :
-
stream function
- ω :
-
constant
- c:
-
centerline
- i:
-
initial conditions
- o:
-
stagnation conditions
- res:
-
reservoir conditions
- AW:
-
adiabatic wall conditions
References
Williams III, J. C., AIAA J. 1 (1963) 186.
Rasmussen, M. L. and K. Karamcheti, An analytic study of viscous effects in a slowly expanding hypersonic nozzle, Stanford University, Department of Aeronautics and Astronautics, Report SUDAER No. 186, Stanford (Cal.) 1964.
Abbott, D. E. and S. J. Kline, Simple methods for the classification and construction of similarity solutions of partial differential equations, Stanford University, Dept. of Mech. Eng., Report No. MD-6, Stanford (Cal.) 1960.
Ames, W. F., Nonlinear partial differential equations in engineering, Academic Press, New York 1965.
Hansen, A. G., Similarity analysis of boundary value problems in engineering, Prentice Hall, Englewood Cliffs (N.J.) 1964.
Chan, Y. Y., Integral methods in compressible laminar boundary layers and their application to hypersonic pressure interactions, NASA CR-284, NASA, Washington (D.C.) 1965.
Yasuhara, M., J. Aerospace Sci. 29 (1962) 667.
Shapiro, A. H., The dynamics and thermodynamics of compressible fluid flow, Ronald Press, New York 1953.
Liepmann, H. W. and A. Roshko, Elements of Gasdynamics, Wiley, New York 1957.
Driest, E. R. van, Investigation of laminar boundary layer in compressible fluids using the crocco method, NACA TN 2597, NACA, Washington (D.C.) 1952.
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Adams, J.C., Williams, J.C. Viscous compressible laminar flow in slender axisymmetric channels with adiabatic walls. Appl. sci. Res. 21, 113–137 (1969). https://doi.org/10.1007/BF00411601
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DOI: https://doi.org/10.1007/BF00411601