Person
Peter Ott
Related publications (74)
EPFL-GTT: Group of Thermal Turbomachinery
The research scope of GTT includes efforts to increase reliability, efficiency and power output of gas turbines and aero engines. The most important areas of research are the following: fluid-structure interaction at forced response and flutter for turbine ...
2014Fluid Flow Pattern Visualisation: An Alternative Approach Using Highly Resolved Heat Transfer Experiments
Peter Ott, Alexandros Terzis, Bernhard Weigand
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 ...
2014Numerical and Experimental Investigation of the Aerodynamic Excitation of a Model Low-Pressure Steam Turbine Stage Operating Under Low Volume Flow
Peter Ott, Benjamin Megerle, Ivan William McBean
The diversification of power generation methods within existing power networks has increased the requirement for operational flexibility of plants employing steam turbines. This has led to the situation where steam turbines may operate at very low volume f ...
Asme2013Unsteady Aerodynamics of Low-Pressure Steam Turbines Operating Under Low Volume Flow
Peter Ott, Benjamin Megerle, Ivan William McBean
Non-synchronous excitation under low volume operation is a major risk to the mechanical integrity of last stage moving blades (LSMBs) in low-pressure (LP) steam turbines. These vibrations are often induced by a rotating aerodynamic instability similar to r ...
2013Unsteady Aerodynamics of Low-Pressure Steam Turbines Operating Under Low Volume Flow
Peter Ott, Benjamin Megerle, Ivan William McBean
Non-synchronous excitation under low volume operation is a major risk to the mechanical integrity of last stage moving blades (LSMBs) in low-pressure (LP) steam turbines. These vibrations are often induced by a rotating aerodynamic instability similar to r ...
2013Experimental and Numerical Investigation of a Fully Confined Impingement Round Jet
Peter Ott, Alexandros Terzis, Gwenael Hannema, Gabriel Charles Gnaegi, Oriana Caggese
The heat transfer characteristics of a fully confined impingement jet are experimentally and numerically evaluated. Full surface heat transfer coefficient distributions are obtained for the target and impingement plate of the model using the transient liqu ...
Pergamon-Elsevier Science Ltd2013Experimental and numerical investigation of narrow impingement cooling channels
Peter Ott, Alexandros Terzis, Bernhard Weigand
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 ...
Elsevier2013Experimental Aeroelastic Investigation of Vibrating Turbine Blade Clusters
The presented work consists of the presentation and discussion of unsteady experimental results of controlled vibration measurements for two single-blade and two cluster test cases subjected to the same subsonic flow conditions. The experiments were perfor ...
Lappeenranta University of Technology2013Experimental Aeroelastic Analysis of Clustered Turbine Blades Vibrating in Mixed Torsion/Bending Mode
This paper presents and discusses unsteady experimental results of controlled vibration measurements of blade-cluster and single-blade test cases, all subjected to the same subsonic ow conditions. The experiments were performed in a non-rotating annular te ...
The American Institute of Aeronautics and Astronautics2013Investigation of Flow Separation Control by Nanosecond Pulsed Dielectric Barrier Discharge Actuators
Peter Ott, Pénélope Leyland, Philip Peschke, Nadia Grech
The ability of nanosecond pulsed DBD actuators to control flow separation was investigated on a NACA 0015 profile for velocities reaching Re = 230,000 (24 m/s). The optimal location for the actuator was determined from oil flow experiments. Moderate voltag ...
2013