Thesis
CFD INVESTIGATIONS OF MIXTURE FORMATION, FLOW AND COMBUSTION FOR MULTI-FUEL ROTARY ENGINE
Von der Fakultät für Maschinenbau, Elektrotechnik and WirtschaftsIngenieurwesen der Brandenburgischen Technischen Universität Cottbus
zur Erlangung des akademischen Grades eines Doktor-Ingenieurs (Dr.-Ing.) genehmigte Dissertation vorgelegt von Master of Science Husni Taher Izweik Geboren am 15.12.1954 in Zawia, Libyen
Vorsitzender: Gutachter: Gutachter:
Prof. Dr.-Ing. P. Steinberg Prof. Dr.-Ing. H.P. Berg Prof. Dr. E. Sigmund 18.11.2009
Tag der mündlichen Prüfung:
I dedicate this work to my family, my wife, and my children
Abstract
Powerful, smooth, compact and light combined with multi-fuel capability are the main features of the rotary engine. The Wankel engine superb power-to-weight ratio and reliability make it not only suitable for automobile application, but also particularly well suited to aircraft engine use and it can replace the reciprocating piston engine in many areas of use such as sport cars, motorcycle, boats, and small power generation units etc. Since the physics that taking place inside Wankel engine combustion chambers are exceedingly complex, a numerical CFD studies were obtained to understand the unsteady, multidimensional fluid flow and fuel-air mixing inside the combustion chamber of the Wankel rotary engine during the intake and compression cycles. The effects of the engine combustion chamber design and operating parameters on fluid flow and fuel-air mixture formation were investigated: engine velocity, direction of fuel injection into the combustion chamber, with emphasize on diesel and hydrogen injection fuels. The injector nozzle size, injected fuel velocity, the position of injector and angle of injection were also investigated. A well known CFD Code AVL-Fire v7.x and v8.x with its moving mesh capability was used to simulate one rotor side, presenting the intake and compression stroke. The CFD-Code is capable of simulating
Von der Fakultät für Maschinenbau, Elektrotechnik and WirtschaftsIngenieurwesen der Brandenburgischen Technischen Universität Cottbus
zur Erlangung des akademischen Grades eines Doktor-Ingenieurs (Dr.-Ing.) genehmigte Dissertation vorgelegt von Master of Science Husni Taher Izweik Geboren am 15.12.1954 in Zawia, Libyen
Vorsitzender: Gutachter: Gutachter:
Prof. Dr.-Ing. P. Steinberg Prof. Dr.-Ing. H.P. Berg Prof. Dr. E. Sigmund 18.11.2009
Tag der mündlichen Prüfung:
I dedicate this work to my family, my wife, and my children
Abstract
Powerful, smooth, compact and light combined with multi-fuel capability are the main features of the rotary engine. The Wankel engine superb power-to-weight ratio and reliability make it not only suitable for automobile application, but also particularly well suited to aircraft engine use and it can replace the reciprocating piston engine in many areas of use such as sport cars, motorcycle, boats, and small power generation units etc. Since the physics that taking place inside Wankel engine combustion chambers are exceedingly complex, a numerical CFD studies were obtained to understand the unsteady, multidimensional fluid flow and fuel-air mixing inside the combustion chamber of the Wankel rotary engine during the intake and compression cycles. The effects of the engine combustion chamber design and operating parameters on fluid flow and fuel-air mixture formation were investigated: engine velocity, direction of fuel injection into the combustion chamber, with emphasize on diesel and hydrogen injection fuels. The injector nozzle size, injected fuel velocity, the position of injector and angle of injection were also investigated. A well known CFD Code AVL-Fire v7.x and v8.x with its moving mesh capability was used to simulate one rotor side, presenting the intake and compression stroke. The CFD-Code is capable of simulating
References: AVL Fire, Species transport, Version 8, July2003. Loyd, R., Curtiss-Wright Corp., R.C. Engine Division. Wood-Ridge. N.J. 07075, Curtiss-Wright Stratified Charge Rotary Engine Development, Combustion Science and