Three-component velocity field measurements of propeller wake using a stereoscopic PIV technique

Lee, Sang Joon; Paik, Bu‐Geun; Yoon, Jong Hwan; Lee, Choung Mook

doi:10.1007/s00348-003-0699-5

Cited by 45 publications

(16 citation statements)

References 5 publications

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“…5(a) and (b), respectively. Lee et al [20] found that no distinct vortices are observed under the lightest loading condition among three different advance ratios. Also, Di Felice et al [7] reported a significant reduction of the perturbation velocity components induced by a propeller with an increased advance ratio.…”

Section: Wake Fieldsmentioning

confidence: 98%

“…Simultaneously, the slipstream contracts toward the propeller shaft, and this contraction continues up to 2R downstream. Lee et al [20] showed that the slipstream contraction continues up to 1D downstream by three-component velocity field measurements of the propeller wake using a stereoscopic PIV technique. In the range of 0.6 6 J 6 0.8, the contraction ratio decreases by 10%-12%.…”

Section: Trajectory Of Tip Vortex and Contraction Ratiomentioning

confidence: 99%

“…Lee et al [20] used a stereoscopic PIV (SPIV) technique to measure the three-dimensional (3-D) flow structure of the turbulent wake behind a rotating propeller at three different advance ratios. The out-of-plane velocity component was determined in order to analyze wake characteristics in more detail.…”

Section: Introductionmentioning

confidence: 99%

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Effects of the advance ratio on the evolution of a propeller wake

et al. 2015

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Section: Wake Fieldsmentioning

confidence: 98%

Section: Trajectory Of Tip Vortex and Contraction Ratiomentioning

confidence: 99%

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Effects of the advance ratio on the evolution of a propeller wake

et al. 2015

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“…Cotroni et al (2000) and Lee et al (2004a) have used PIV and PTV (particle tracking velocimetry), respectively, to investigate the near-wake of an isolated marine propeller in longitudinal planes. Calcagno et al (2002) and Lee et al (2004b) investigated the complicated 3-D flow behind a marine propeller in the transverse and longitudinal planes using a stereoscopic PIV (SPIV) technique. Di Felice et al (2004) measured the propeller wake with PIV technique and they useful information on the influence of propeller loading.…”

Section: Introductionmentioning

confidence: 99%

Visualization of the inflow ahead of a rotating propeller attached to a container ship model

Paik

Kim

Lee

et al. 2007

J Vis

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The inflow ahead of a rotating propeller attached to a container ship model was visualized using a two-frame particle image velocimetry (PIV) technique. For illuminating the inflow region, a transparent window was installed at the stern of the ship model. Ensemble-averaged mean velocity fields were measured at four different blade phases under the design loading condition. The characteristics of the inflow in the upper plane above the propeller axis are quite different from those below the propeller axis. In the far upstream region above the propeller axis, most of the inflow comes from the hull wake and the axial velocity is very small. As the inflow moves toward the propeller plane, its axial velocity component increases rapidly. In addition, the variation of the inflow characteristics with respect to phase angle becomes apparent. The thick hull boundary layer and out-of-plane motion resulting from the propeller rotation produce a large turbulent kinetic energy around the tip of the propeller blade in the upper inflow region. The axial velocity distribution of the propeller inflow is asymmetric with respect to the vertical center axis, exhibiting different axial velocities on the port and starboard sides.

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“…Yoon (2009)은 DTMB 5512 모형선의 수평면 운동 장치(horizontal planar motion mechanism, HPMM)를 사용하여 위상 평균 유동장을 계 측하였으며, Kim, et al (2011), Hwang, et al (2012은 예인수 조에서 KVLCC2 선형의 선미 유동장을 계측하였다. 그리고 Calcagno, et al (2002), Di Felice & De Gregorio (2001, Felli, et al (2002), Paik, et al (2004)은 공동수조에서 프로펠 러 작동 상태의 선미부 후류 특성을 조사하였으며, Cotroni, et al (2000), Di Felice, et al (2004), Lee, et al (2004), Paik, et al (2007)은 단독 시험 상태의 프로펠러 후류를 계측하였다.…”

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Nominal Wake Measurement for KVLCC2 Model Ship in Regular Head Waves at Fully Loaded Condition

Kim¹,

Jang²,

Hwang³

et al. 2016

Journal of the Society of Naval Architects of Korea

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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License(http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.In the ship design process, ship motion and propulsion performance in sea waves became very important issues. Especially, prediction of ship propulsion performance during real operation is an important challenge to ship owners for economic operation in terms of fuel consumption and route-time evaluation. Therefore, it should be considered in the early design stages of the ship. It is thought that the averaged value and fluctuation of effective inflow velocity to the propeller have a great effect on the propulsion performance in waves. However, even for the nominal velocity distribution, very few results have been presented due to some technical difficulties in experiments. In this study, flow measurements near the propeller plane using a stereo PIV system were performed. Phase-averaged flow fields on the propeller plane of a KVLCC2 model ship in waves were measured in the towing tank by using the stereo PIV system and a phase synchronizer with heave motion. The experiment was carried out at fully loaded condition with making surge, heave and pitch motions free at a forward speed corresponding to Fr=0.142 (Re=2.55×106) in various head waves and calm water condition. The phase averaged nominal velocity fields obtained from the measurements are discussed with respect to effects of wave orbital velocity and ship motion. The low velocity region is affected by pressure gradient and ship motion.

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Three-component velocity field measurements of propeller wake using a stereoscopic PIV technique

Cited by 45 publications

References 5 publications

Effects of the advance ratio on the evolution of a propeller wake

Effects of the advance ratio on the evolution of a propeller wake

Visualization of the inflow ahead of a rotating propeller attached to a container ship model

Nominal Wake Measurement for KVLCC2 Model Ship in Regular Head Waves at Fully Loaded Condition

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