Publications by Magnus Jonsson

Investigation of High-Pressure Turbine Endwall Film-Cooling Performance Under Realistic Inlet Conditions

Progress in materials and manufacturing techniques allows an increase of the mean turbine inlet temperature, resulting in improved efficiency and specific power of the turbine. Because of the combustor characteristics, thermal and aerodynamic nonuniformiti ...

American Institute of Aeronautics and Astronautics2012

Investigation of High Pressure Turbine End-Wall Film Cooling Performances under Realistic Inlet Conditions

Peter Ott, Magnus Jonsson

The mean value of turbine entry temperature increased to improve efficiency and specific power. Due to the combustor characteristics, thermal and aero-dynamics non-uniformities can be individuated at the turbine inlet section. Then, a further increase in t ...

2011

Application of Photoluminescent Measurement Techniques for Quantitative Assessment of Turbine Film Cooling

Magnus Jonsson

Reduction of the specific fuel consumption of gas turbines can be achieved by maximizing the turbine inlet temperature. However, this requires a detailed understanding of the cooling performance in order to ensure safe and economical operation of the engin ...

EPFL2010

Investigation of End-Wall Film Cooling Configuration Performances in a Linear Cascade

Peter Ott, Magnus Jonsson

An end-wall cooling geometry with both fan-shaped and cylindrical holes is tested. The test case is composed by a linear cascade with cylindrical blades, the cooling holes disposed over eight rows. Each row is disposed along iso-Mach lines to ensure same b ...

2010

Experimental and Numerical Study of the Thermal Performance of a Film Cooled Turbine Platform

Peter Ott, Magnus Jonsson, Dominique Charbonnier

Detailed surface measurements of the thermal performance of a film cooling system have been performed on the endwall of a nozzle guide vane (NGV) mounted in a linear cascade facility at EPFL. An external cooling scheme including several rows of fan-shaped ...

American Soc Mechanical Engineers, Three Park Avenue, New York, Ny 10016-5990 Usa2009

Comparison of Numerical Investigations With Measured Heat Transfer Performance of a Film Cooled Turbine Vane

Peter Ott, Magnus Jonsson, Dominique Charbonnier

Detailed surface measurements of the heat transfer coefficient and the film cooling effectiveness by application of the transient liquid crystal method were carried out on a heavily film cooled nozzle guide vane (NGV) in a linear cascade wind tunnel at the ...

American Soc Mechanical Engineers, Three Park Avenue, New York, Ny 10016-5990 Usa2008

Application of the Transient Heater Foil Technique for Heat Transfer and Film Cooling Effectiveness Measurements on a Turbine Vane Endwall

Peter Ott, Magnus Jonsson, Dominique Charbonnier

The paper presents an application of the transient heater foil measurement technique using thermochromic liquid crystals (TLC) to endwall heat transfer and film cooling investigations in a transonic turbine vane cascade. The film cooling configuration cons ...

American Soc Mechanical Engineers2008

Application of the Transient Heater Foil Technique for Heat Transfer Measurements

Peter Ott, Magnus Jonsson

An electrically heated foil glued on top of an acrylic wall is employed to measure convective heat transfer on turbine vane platforms. The use of a heater foil requires specific filtering techniques to obtain the searched quantities – heat transfer coeffic ...

2008

Numerical Analysis of Adiabatic Film Cooling Effectiveness Around HP-Turbine Airfoil – Decomposed Computation of Internal-External Airflows

Peter Ott, Magnus Jonsson, Dominique Charbonnier

2008

Heat Transfer Experiments on an Heavily Film Cooled Nozzle Guide Vane

Peter Ott, Magnus Jonsson

2007