Modelling of interaction of shock waves with analytical methods

Koç, Mesut
In supersonic air vehicles, specially shaped air ducts are used to supply the air with required properties to the combustion chambers. Two-dimensional supersonic flow solvers used to design such geometrical shapes have become less accurate as the geometrical shape of the air duct becomes asymmetric or flow becomes three-dimensional. This problem can be overcome by solving the interaction between shock planes using analytical methods. In this study, an analytical solution model based on principles of gas dynamics is to be conducted and validation of this solution model is to be done via existing experimental data and computational fluid dynamics tools. Solution time is to be reduced and prototyping-testing expenses are to be decreased with the solution of the problem using analytical methods.


Simulation of the Transient Response of a Helicopter Turboshaft Engine to Hot-Gas Ingestion
Uzol, Oğuz; Yavrucuk, İlkay (2008-06-09)
Hot-Gas Ingestion (HGI) to the engines can potentially occur when a rotorcraft or a VTOL/STOVL fixed-wing aircraft is operating in close proximity to the ground. Especially for helicopters, due to the rotor downwash hot exhaust gases get recirculated into the engine inlet. Similar conditions may also occur due to the ingestion of hot exhaust gases from rocket launchers or gun fire. In this study, we present the results of a simulation of the transient response of a helicopter turboshaft engine to HGI. Speci...
Effects of heat input on metallurgical behavior in HAZ of multi-pass and multi-layer welded IN-939 superalloy
Mashhuriazar, Amirhossein; Gür, Cemil Hakan; Sajuri, Zainuddin; Omidvar, Hamid (2021-11-01)
The hot components of a gas turbine are susceptible to damage in the high-temperature environment of turbine engine operation. Given that these components are relatively costly to manufacture, they are often repaired than replaced when damaged. Fusion welding is an economical method for repairing the damaged components of a gas turbine. This research examines the roles of heat input, pass number and layer number on the intergranular liquation cracking of the Inconel-939 (IN-939) precipitate nickel base supe...
Estimation of Critical Submergence at Single Horizontal Intakes Under Asymmetric Flow Conditions
Haspolat, Emre (2022-01-01)
Air-entraining vortices are one of the serious hydraulic phenomena which can create various problems during the operation of intakes. Generally, air-entraining vortices start to form when the intake submergence is insufficient and less than a critical value. The purpose of the present study is to investigate the formation of air-entraining vortices and determine the critical submergences at single horizontal intake under asymmetrical approach flow conditions by conducting experiments with four different pip...
Experimental characterization of a pressure swirl spray by analyzing the half cone angle fluctuation
Amoresano, A.; Allouis, Christophe Gerard; Di Santo, M.; Iodice, P.; Quaremba, G.; Niola, V (2018-06-01)
Pressure swirl sprays are frequently used in burners for gas turbines like the LPP chamber or to generate diffusion flames. Combustion between fuel and the air is governed by complex phenomena determined by the mixing of the mass flow rate of the two phases liquid and gaseous. Characterization of the spray by measuring the half cone angle fluctuations with a speed camera and a Lagrangian approach allows the working space of the spray to be defined and the "signature" of the spray in well-defined conditions ...
Özden, Aysu; Baran, Özgür Uğraş; Aksel, Mehmet Hâluk (null; 2019-09-19)
Cold gas propulsion systems are mainly used for attitude controlof satellites.It is possible to obtainvery low pressure and temperature at the exit section of the nozzledue to propulsion system’s nature. Investigation of steady state performance of a cold gas thruster under real gas effects is decided to be carried out. SU2, an open source compressible CFD tool,is used for analyses ofideal gas, Peng-Robinson and van-der Waals gas models. Vacuum chamber test facility of Roketsan is usedfor performance tests....
Citation Formats
M. Koç, “Modelling of interaction of shock waves with analytical methods,” M.S. - Master of Science, Middle East Technical University, 2022.