Personne

Bernhard Weigand

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Publications associées (12)

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Integrally cast turbine airfoils with wall-integrated cooling cavities are greatly applicable in modern turbines providing enhanced heat exchange capabilities compared to conventional cooling passages. In such arrangements, narrow impingement channels can ...

American Society of Mechanical Engineers2016

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This paper demonstrates that the impact of nanosecond pulsed dielectric barrier discharge (ns-DBD) actuators on the structure of the boundary layer can be investigated using quantitative convective heat transfer measurements. For the experiments, the flow ...

Iop Publishing Ltd2015

Effect of Varying Jet Diameter on the Heat Transfer Distributions of Narrow Impingement Channels

Peter Ott, Alexandros Terzis, Bernhard Weigand

The development of integrally cast turbine airfoils allows the production of narrow impingement channels in a double-wall configuration, where the coolant is practically injected within the wall of the airfoil providing increased heat transfer capabilities ...

Asme2015

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The present study demonstrates an alternative approach for describing ﬂuid ﬂow characteristics very close to the wall, using locally resolved convective heat transfer experiments. Heat transfer coefﬁcients on the base surface and around a surface mounted v ...

Elsevier2015

Detailed Heat Transfer Distributions of Narrow Impingement Channels for Cast-In Turbine Airfoils

Peter Ott, Alexandros Terzis, Bernhard Weigand

The current capabilities of the foundry industry allow the production of integrally cast turbine airfoils. Impingement cooling effectiveness can be then further increased due to the manufacturing feasibility of narrow impingement cavities in a double-wall ...

American Society of Mechanical Engineers2014

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Impingement cooling is widely used in the cooling of turbine airfoils at critical regions where high heat transfer rates are required due to the large local convection coefficients that can be achieved. An accurate determination of local heat transfer dist ...

2014

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ASME2014

Hole Staggering Effect on the Cooling Performance of Narrow Impingement Channels Using the Transient Liquid Crystal Technique

Peter Ott, Alexandros Terzis, Bernhard Weigand, Guillaume Wagner

This study examines experimentally the cooling performance of narrow impingement channels as could be cast-in in modern turbine airfoils. Full surface heat transfer coefficients are evaluated for the target plate and the sidewalls of the channels using the ...

American Society of Mechanical Engineers2014

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The present study demonstrates an alternative approach for describing fluid flow characteristics very close to the wall, using locally resolved heat transfer experiments. Convection coefficients on the base surface and around a surface mounted vortex gener ...

2014

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Impingement cooling effectiveness of gas turbine vanes and blades can be further increased due to the manufacturing feasibility of integrally cast airfoils which can provide narrow impingement cooling cavities. This study examines experimentally using the ...

Elsevier2013

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