Main Article Content
Abstract
The characteristics of installed intakes of a ramjet engine at angle of attack are predicted numerically. Three dimensional Navier Stokes equations are solved alongwith k - ε turbulence model using commercial CFD software. The software was first validated for isolated intake and computed results match very well with theoretical results available in literature. Pressure recovery Vs. mass flow characteristics of four installed intakes placed in a rear location of a ramjet vehicle is evaluated at different angles of attack upto 6°. Intake performance matches reasonably well with experimental results. It has been observed that significant variation of intake performance exists between windward and leeward intakes. For higher angle of attack, the leeward intake move towards the subcritical operation faster and the intake flowfield is seen to interact with the corebody boundary layer causing significant spillage.
Keywords
Article Details
References
- Seddon, J. and Goldsmith, E.L. , "Intake Aerodynamics", AIAA Education Series, 1985.
- Shigematsu, J. and Yumamoto, K., "Numerical Simulation of Supersonic Inlet Using Implicit TVD scheme", AIAA Paper 90-2135, 1990.
- Watanabe, Y., Murukami, A. and Fujiwara, H., "Effect of Sidewall Configurations on the Aerodynamics Performance of Supersonic Air Intake", AIAA Paper 2002-3777, 2002.
- Newsome, R.W., "Numerical Simulation of Near critical and Unsteady Supercritical Inlet Flow", AIAA Journal, Vol. 22, No. 10, 1984, pp. 1375- 1379.
- Fujiwara, H., Murakami, A. and Watanabe, Y., "Numerical Analysis on Shock Oscillation of Two-dimensions External Compression Intakes", AIAA Paper No. 2002-2740, 2002.
- Lu, P.J. and Jain, L-T., "Numerical Investigation of Inlet Buzz Flow", AIAA Journal, Vol.14, No.1, 1998, pp. 90-100.
- Oh, J.Y., Fuhara Ma., Shih-Yang Hseih and Vigor Yang., "Interactions Between Shock and Acoustic Waves in a Supersonic Inlet Diffuser", Journal of Propulsion and Power, Vol.21, No.3, pp.486-494.
- Theerthamalai, P., Mani Sekharan, S., Umakant, J. and Selvarajan, S., "Experimental Investigation of an Installed Air Intake Model", National Conference on Air Breathing Engine 2002, Bangalore, January 2003.
- User Manual, CFX TASCFlow 2.11.1, AEA Technology, 2001.
- User Manual, CFX 5.7.1, Ansys India, 2004.
References
Seddon, J. and Goldsmith, E.L. , "Intake Aerodynamics", AIAA Education Series, 1985.
Shigematsu, J. and Yumamoto, K., "Numerical Simulation of Supersonic Inlet Using Implicit TVD scheme", AIAA Paper 90-2135, 1990.
Watanabe, Y., Murukami, A. and Fujiwara, H., "Effect of Sidewall Configurations on the Aerodynamics Performance of Supersonic Air Intake", AIAA Paper 2002-3777, 2002.
Newsome, R.W., "Numerical Simulation of Near critical and Unsteady Supercritical Inlet Flow", AIAA Journal, Vol. 22, No. 10, 1984, pp. 1375- 1379.
Fujiwara, H., Murakami, A. and Watanabe, Y., "Numerical Analysis on Shock Oscillation of Two-dimensions External Compression Intakes", AIAA Paper No. 2002-2740, 2002.
Lu, P.J. and Jain, L-T., "Numerical Investigation of Inlet Buzz Flow", AIAA Journal, Vol.14, No.1, 1998, pp. 90-100.
Oh, J.Y., Fuhara Ma., Shih-Yang Hseih and Vigor Yang., "Interactions Between Shock and Acoustic Waves in a Supersonic Inlet Diffuser", Journal of Propulsion and Power, Vol.21, No.3, pp.486-494.
Theerthamalai, P., Mani Sekharan, S., Umakant, J. and Selvarajan, S., "Experimental Investigation of an Installed Air Intake Model", National Conference on Air Breathing Engine 2002, Bangalore, January 2003.
User Manual, CFX TASCFlow 2.11.1, AEA Technology, 2001.
User Manual, CFX 5.7.1, Ansys India, 2004.