Search results | TU Delft Repositories

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Can we have our cake and still eat it?: A review of flexibility in the structural spatial development and passenger transport relation in developing countries

Pennings, Rogier (author), Wiegmans, B. (author), Spit, Tejo (author)

With growing urban populations, higher mobility needs, limited available space for transport infrastructure, and the increasing need for more attractive urban areas, these urban areas are faced with a complex dilemma, which gets more challenging by the day. This paper examines the role of flexibility in the relationship between structural...

review 2020

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Dynamics of Vortex Cavitation

Pennings, P.C. (author)

This thesis describes the mechanisms with which tip vortex cavitation is responsible for broadband pressure fluctuations on ship propellers. Hypotheses for these are described in detail by Bosschers (2009). Validation is provided by three main cavitation-tunnel experiments, one on a model propeller and two on a stationary wing. These have...

doctoral thesis 2016

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Cavitation tunnel analysis of radiated sound from the resonance of a propeller tip vortex cavity

Pennings, P.C. (author), Westerweel, J. (author), Van Terwisga, T.J.C. (author)

The goal of this study is to test the hypothesis that the resonance of a tip vortex cavity is responsible for high-amplitude broadband pressure-fluctuations, typically between 40 and 70 Hz,Hz, for a full scale propeller. This is achieved with a model propeller in a cavitation tunnel. Simultaneous high-speed video shadowgraphy and sound...

journal article 2016

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Sound signature of propeller tip vortex cavitation

Pennings, P.C. (author), Westerweel, J. (author), Van Terwisga, T.J.C. (author)

The design of an efficient propeller is limited by the harmful effects of cavitation. The insuffcient understanding of the role of vortex cavitation in noise and vibration reduces the maximum effciency by a necessary safety margin. The aim in the present study is to directly relate propeller cavitation sound to tip vortex cavity dynamics. This...

conference paper 2015

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Flow field measurement around vortex cavitation

Pennings, P.C. (author), Westerweel, J. (author), Van Terwisga, T.J.C. (author)

Models for the center frequency of cavitating-vortex induced pressure-fluctuations, in a flow around propellers, require knowledge of the vortex strength and vapor cavity size. For this purpose, stereoscopic particle image velocimetry (PIV) measurements were taken downstream of a fixed half-wing model. A high spatial resolution is required and...

journal article 2015

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Dynamics of isolated vortex cavitation

Pennings, P.C. (author), Bosschers, J. (author), Westerweel, J. (author), Van Terwisga, T.J.C. (author)

The dynamic behaviour of vortex cavitation on marine propellers may cause inboard noise and vibration, but is not well understood. The main goal of the present study is to experimentally analyse the dynamics of an isolated tip vortex cavity generated at the tip of a wing of elliptical planform. Detailed high-speed video shadowgraphy was used to...

journal article 2015

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Bruikbare handreikingen voor een verbrede gebiedsgerichte aanpak: Gebaseerd op de ervaringen in de casus Hart van Zuid

Franzen, A.J. (author), Ginter, D. (author), De Hoog, W. (author), Pennings, R. (author)

Wat waren de bepalende factoren in het aanbestedingsproces Hart van Zuid om te komen tot het uiteindelijke resultaat? En wat zijn hieruit naar voren komende bruikbare handreikingen voor de verbrede gebiedsgerichte aanpak die de gemeente Rotterdam nastreeft?

report 2015

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Bruikbare handreikingen voor een gebiedsgerichte aanpak: Gebaseerd op de ervaringen in de casus Hart van Zuid

Franzen, A.J. (author), De Hoog, W. (author), Pennings, R. (author), Ginter, D. (author)

report 2015

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Modelling of Tip Vortex Cavitation for Engineering Applications in OpenFOAM

Schot, J.J.A. (author), Pennings, P.C. (author), Pourquie, M.J.B.M. (author), Van Terwisga, T.J.C. (author)

In this paper modelling assumptions for the prediction of tip vortex flow and vortex cavitation with the RANS equations and homogeneous fluid approach in Open-FOAM are presented. The effects of the changes in the turbulence model are investigated and the results are compared with PIV measurements.

conference paper 2014

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Voorverslag Rollerbarge (Vertrouwelijk)

Pennings, M.S.H. (author)

other 1997

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Rollerbarge. Transporttechnische uitwerking van een nieuw overslagsysteem

Pennings, M.S.H. (author)

master thesis 1997

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Ontwerp platformwagen voor een "dual hoist" containerkraan

Pennings, M.S.H. (author)