Search Results - "Kalfas, I"

Piezoelectric energy harvesting experiments under combined aerodynamic and base excitation by Stamatellou, Antiopi-Malvina, Kalfas, Anestis I

“…The behavior of film-type piezoelectric energy harvesters under simultaneous aerodynamic and base excitation was experimentally investigated. Two flutter type…”
Get full text

On the Efficiency of a Piezoelectric Energy Harvester under Combined Aeroelastic and Base Excitation by Stamatellou, Antiopi-Malvina, Kalfas, Anestis I.

“…A flutter-type, nonlinear piezoelectric energy harvester was tested in various combinations of aerodynamic and harmonic base excitation to study its power…”
Get full text

Principles of bone healing by Kalfas, I H

“…Our contemporary understanding of bone healing has evolved due to knowledge gleaned from a continuous interaction between basic laboratory investigations and…”
Get full text

Virtual four sensor fast response aerodynamic probe (FRAP®) by Pfau, Axel, Schlienger, Joel, Kalfas, Anestis I., Abhari, Reza S.

“…This paper introduces the new fast response aerodynamic probe (FRAP®), which was recently developed at the ETH Zurich. The probe provides time-resolved,…”
Get full text

Flow adaptive aerodynamic probe for turbomachinery flows by Lenherr, Christian, Oschwald, Martin, Kalfas, Anestis I., Abhari, Reza S.

“…In order to enable turbomachinery research to obtain data highly resolved in space and time, a novel flow adaptive aerodynamic probe concept has been developed…”
Get full text

Development of single sensor fast response pressure probes by Tanaka, Keizo, Kalfas, Anestis I., Hodson, Howard P.

“…Multi-sensor fast response pressure probes are often used in turbomachinery investigations. However, the size of multi-sensor probes are often larger than is…”
Get full text

A probabilistic uncertainty evaluation method for turbomachinery probe measurements by Behr, Thomas, Kalfas, Anestis I., Abhari, Reza S.

“…The paper presents a probabilistic uncertainty evaluation method described in the Guide to the Expression of Uncertainty in Measurement (GUM) [1] and its…”
Get full text

Evaluation of pressure and species concentration measurement using uncertainty propagation by Stefopoulos, Georgios, Rigas, Stylianos, Tsirikoglou, Panagiotis, Kalfas, Anestis I.

“…This paper presents a probabilistic uncertainity evaluation method as described in the Guide to the Expression of Uncertainty in Measurements (GUM) and its…”
Get full text

A miniature optical extinction heated probe for fog droplet measurements in steam turbines by Bosdas, Ilias, Mansour, Michel, Kalfas, Anestis I., Abhari, Reza S.

“…The knowledge of droplet size distribution and concentration allows us to calculate the wetness fraction and the isentropic turbine efficiency as well as to…”
Get full text

Single pressure transducer probe for 3D flow measurements by Schlienger, Joel, Pfau, Axel, Kalfas, Anestis I., Abhari, Reza S.

“…A new method of measuring 3D flow with a single pressure transducer mounted inside the head of a single probe is presented in this paper. The 3D flow field…”
Get full text

Stereoscopic PIV measurements in a two-stage axial turbine by Porreca, Luca, Kalfas, Anestis I., Abhari, Reza S., Yun, Yong Il, Song, Seung Jin

“…In the present work, the three-dimensional flow field in the interstage region of a twostage axial turbine has been measured by a stereoscopic PIV system. The…”
Get full text

Application of oil and dye flow visualization in incompressible turbomachinery flows by Terzis, Alexandros, Zachos, Pavlos K., Charnley, Bernard A., Kalfas, Anestis I.

“…Flow visualization is one of many available tools in experimental fluid mechanics and is used from the primary stages of fluid mechanics research in order to…”
Get full text

The Role of Adjuvant Radiation Therapy in Patients With Myxopapillary Ependymomas by Kotecha, R, Modugula, S, Angelov, L, Benzel, E.C, Reddy, C.A, Prayson, R, Kalfas, I, Schlenk, R, Krishnaney, A, Steinmetz, M, Bingaman, W, Suh, J.H, Chao, S.T

Get full text

Thermal energy storage in combined cycle power plants: comparing finite volume to finite element methods by Gkoutzamanis, Vasilis G., Chiu, Justin N. W., Martin, Guillaume, Kalfas, Anestis I.

“…The research in thermal energy storage (TES) systems has a long track record. However, there are several technical challenges that need to be overcome, to…”
Get full text

Experimental investigation of energy harvesting from swirling flows using a piezoelectric film transducer by Stamatellou, Antiopi-Malvina, Kalfas, Anestis I.

“…•Air swirler instead of blunt body used to produce flow field for energy harvesting.•Innovative test rig designed and successfully tested with piezoelectric…”
Get full text

Testing of piezoelectric energy harvesters isolated from base vibrations by Stamatellou, Antiopi-Malvina, Kalfas, Anestis I.

“…•Isolation of piezoelectric energy harvesters from base vibrations.•Piezo-film transducers were excited by vortices.•The transducer output was fed to a…”
Get full text

Recuperators investigation for high temperature supercritical carbon dioxide power generation cycles by Gkountas, Apostolos A., Stamatelos, Anastassios M., Kalfas, Anestis I.

“…•Steady-state modeling of s-CO2 recompression cycle comparing two different tools.•Segmental design method and analysis of PCHE recuperators.•Heat transfer and…”
Get full text

A hybrid computational aeroacoustic methodology for broadband noise prediction by Ricks, Nathan, Nixarlidis, Christos A., Kalfas, Anestis I., Ghorbaniasl, Ghader

“…Current hybrid computational aeroacoustic methodologies for broadband noise prediction rely on large eddy simulation (LES) for noise source computation, and…”
Get full text

Performance evaluation of three latent heat storage designs for cogeneration applications by Xu, Tianhao, Gkoutzamanis, Vasilis G., Dong, Haoyang, Muhammad, Yousif, Efstathiadis, Theofilos G., Kalfas, Anestis I., Laumert, Björn, Chiu, Justin Ningwei

“…•Evaluate three novel latent heat storage designs for cogeneration application.•Conduct 3-D simulation to study secondary flow effect in spiral coil heat…”
Get full text

Design analysis of a novel orifice control valve for turbomachinery testing facilities by Peteinaris, Alexandros, Kalfas, Anestis I

“…In testing facilities for turbomachinery applications, the main component for the regulation of the flow is the control valve. In order to fulfill the flow…”
Get full text