...Guillermo Paniagua; Sergio Lavagnoli; Tom Verstraete; Wassim Mahmoudi; Tariq Benamara Purpose Contra‐rotating turbines offer reduced size, weight, and cooling requirements, compared to conventional co‐rotating machinery. In spite of the associated mechanical complexity, their aero‐thermal...

...M. Tutar; Ü. Sönmez Purpose The purpose of this paper is to numerically study inflow turbulence effects on the transitional flow in a high pressure linear transonic turbine at the design incidence. Design/methodology/approach The three‐dimensional (3‐D) compressible turbulent flow in a turbine...

...C.X‐Z. Zhang; I. Hassan Purpose Numerical simulations were carried out for two cooling schemes, a circular hole and a louver cooling scheme, at the leading edge of a rotor blade in a complete turbine stage. Design/methodology/approach Two holes were positioned at the leading edge of a rotating...

...Sung In Kim; Hamidur Rahman; Ibrahim Hassan Purpose One of the most critical gas turbine engine components, the rotor blade tip and casing, is exposed to high thermal load. It becomes a significant design challenge to protect the turbine materials from this severe situation. The purpose...

... low heating value (LHV) fuel on an annular miniature gas turbine (MGT) via numerical simulations. Design/methodology/approach The MGT used in this study is MW‐44 Mark I, whose original fuel is liquid (Jet A1). Its fuel supply system is re‐designed to use biogas fuel with LHV. The simulations...

... 2010 Turbulent flow Modelling Turbines Accurate calculation of the mean and turbulence flow fields within a swirl‐stabilized gas‐turbine combustor still represents a major challenge more than 30 years after Jones and Launder (1972) introduced the k‐ ε turbulence model...

...Zdzislaw Mazur; Rafael Campos‐Amezcua; Alfonso Campos‐Amezcua Purpose This paper aims to validate an axial turbine modified nozzle design, looking for a reduction of the nozzle erosion process during operation in power plants. Design/methodology/approach The approach taken is numerical...

... to the understanding of the flow and thermal development in cooling passages of gas turbine blades, and to the validation of turbulence models that can be used for their prediction, at both effective viscosity and second‐moment closure levels. The calculations presented here have been carried out using the STREAM...

... severe test cases, namely, the subsonic flow through a turbine cascade with separated‐flow transition; and the transonic flow through a compressor cascade with transitional boundary layers, shock‐induced separation and corner stall. For the first test case, the transition model of Mayle for separated...

... is the density, c_p is the constant pressure specific heat and k is the thermal conductivity. Ibrahim Ozkol is the corresponding author and can be contacted at: ozkol@itu.edu.tr © Emerald Group Publishing Limited 2006 Rotational motion Flow Turbines Heat...