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Investigating the effects of secondary and dilution air holes and chamber diameter on the performance of ramjet engine combustion chamber | ||
| مکانیک سیالات و آیرودینامیک | ||
| Article 10, Volume 12, Issue 1 - Serial Number 31, October 2023, Pages 123-132 PDF (886.34 K) | ||
| Document Type: Original Article | ||
| Authors | ||
| mohammad mahdi Doustdar* 1; Sajjad Gharezi,2 | ||
| 1Professor, Imam Hossein University, Tehran, Iran | ||
| 2Master's degree, Imam Hossein University, Tehran, Iran | ||
| Abstract | ||
| In this research, the performance of ramjet engine combustion chamber has been evaluated by applying geometrical and physical changes such as changing the diameter of the chamber, changing the size and displacement of the secondary and dilution air holes and changing the mass flow passing through these holes. To do this, at first some typical ramjet combustion chambers were introduced and some of their features were discussed. Then using the information and guidance presented in scientific and technical references a suitable combustion chamber was designed for the defined inlet and outlet conditions. After the geometry has been determined, the simulation process has been carried out in Fluent software and while presenting the results, the performance of the chamber has been investigated. The results show that the values obtained for the geometry of the chamber and the position of the holes are reliable and changing the sizes has no global advantage and is not recommended. Furthermore, it is found that displacing air holes location could improve solution convergence. . | ||
| Keywords | ||
| Ramjet Engine; Combustion Chamber; Numerical Analysis; Secondary Air Flow | ||
| References | ||
|
[1] Doustdar, M.M. "Spark Ignition Engines; Quasi Dimensional Simulation", Imam Hossein Comprehensive University Publications, 2021. (In Persian) [2] El-Sayed, A.F. "Aircraft Propulsion and Gas Turbine Engines", New York, CRC Press, 2008. [3] Conrado, A.C., Lacava, P.T., Pereira Filho, A.C., and Sanches, M.S. "Basic Design Principles for Gas Turbine Combustor", 10th Brazilian Congress of Thermal Sciences and Engineering, Rio de Janeiro, Brazil, 2004. [4] Bayat, A. "Preliminary Design and Numerical Simulation of Ramjet Combustion Chamber", M.S. Thesis, Shiraz University, Shiraz, 2015. (In Persian) [5] Mark, C.P. and Selwyn, A. "Design and Analysis of Annular Combustion Chamber of a Low Bypass Turbofan Engine in a Jet Trainer Aircraft", Propulsion and Power Research, Vol. 5, No. 2, pp. 97-107, 2016. [6] Bondaryuk, M. and Lyashenko, S.M. "Translation of Ramjet Engines", Ohio: Technical Information Center, Wright-Patterson Air Force Base, 1960. [7] Schobeiri, M.T. "Gas Turbine Design; Components and System Design Integration", Gewerbestrasse, Switzerland, Springer Nature, 2018. [8] Gharezi, S. and Doustdar, M.M. "Design, Numerical Analysis and Parametric Study of Can Combustion Chamber", 3rd International Conference in Electrical, Computer and Mechanical Engineering, Tehran, Iran, 2023. (In Persian) [9] Lefebvre, A.H. and Ballal, D.R. "Gas Turbine Combustion; Alternative Fuels and Emissions", 3rd ed, New York, CRC Press, 2010. [10] Vosoughi, Z. and Tabejamaat, S. "Design and Simulation of a 30kW Microturbine Combustor Fed by Biofuel", The 9th Fuel & Combustion Conference of Iran, Shiraz, Iran, 2022. (In Persian) [11] Mattingly, J.D., Heiser, W.H., and Pratt, D.T. "Aircraft Engine Design", 2nd ed., Virginia, AIAA, 2002. [12] Lee, J.F. "Theory and Design of Steam and Gas Turbines", New York, McGraw-Hill, 1954. [13] Guide, A.F.T. "ANSYS Fluent Tutorial Guide 18", ANSYS Fluent Tutorial Guide 18, 15317, 2018 | ||
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