Results 21 to 30 of about 353,662 (303)
Estimate of Strouhal and Reynolds numbers for swimming penguins
Journal of Avian Biology, 2022 Propulsion performance of swimming and flying animals is often evaluated by using dimensionless numbers, such as the Strouhal and Reynolds numbers. They have been shown to allow a better understanding of locomotion efficiency, using relatively simple ...
M. H. Masud, M. La Mantia, P. Dabnichki
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Power Prediction Method for Ships Using Data Regression Models
Journal of Marine Science and Engineering, 2023 This study proposes machine learning-based prediction models to estimate hull form performance. The developed models can predict the residuary resistance coefficient (CR), wake fraction (wTM), and thrust deduction fraction (t). The multi-layer perceptron
Yoo-Chul Kim +5 more
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Propulsion tests on ultra-high-temperature ceramic matrix composites for reusable rocket nozzles
Journal of Advanced Ceramics, 2023 Ultra-high-temperature ceramic matrix composites (UHTCMCs) based on a ZrB2/SiC matrix have been investigated for the fabrication of reusable nozzles for propulsion.
Diletta Sciti +8 more
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Comparison of Active Drag Using the MRT-Method and the MAD-System in Front Crawl Swimming
Proceedings, 2018 The purpose of this study was to compare the active drag values estimated by the MRT-method and the MAD-system. Six male competitive swimmers participated in this study and performed front crawl with arms only condition.
Kenzo Narita +3 more
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Fringe Visibility Estimators for the Palomar Testbed Interferometer [PDF]
, 1998 Visibility estimators and their performance are presented for use with the Palomar Testbed Interferometer (PTI). One operational mode of PTI is single-baseline visibility measurement using pathlength modulation with synchronous readout by a NICMOS-3 ...
Colavita Jet Propulsion, M. M. Colavita
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CFD Analysis of De Laval Nozzle of a Hybrid Rocket Engine [PDF]
E3S Web of Conferences: The study gives a general overview of the CFD-simulated gas flow via the nozzle of a De Laval rocket engine. In CFD software, the mesh is generated using the nozzle’s geometry.
Ahmad Mohamed Tarmizi +6 more
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Self-propulsion of liquid marbles: Leidenfrost-like levitation driven by marangoni flow [PDF]
, 2015 Self-propulsion of liquid marbles filled with aqueous alcohol solutions and placed on a water surface is reported. The characteristic velocity of the marbles is ca. 0.1 m/s.
Aharoni, Hadas +5 more
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A Study on the Propulsion Performance in the Actual Sea by means of Full-scale Experiments [PDF]
TransNav, 2013 The IMO has adopted Energy Efficiency Design Index (EEDI), Ship Energy Efficiency Management Plan (SEEMP) and Energy Efficiency Operational Indicator (EEOI) in order to reduce GHG emissions from international shipping.
Jun Kayano +3 more
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Artificial three-body equilibria for hybrid low-thrust propulsion [PDF]
, 2008 This paper proposes a new concept of creating artificial equilibrium points in the circular restricted three body problem, where the third body uses a hybrid of solar sail and solar electric propulsion.
Baig, Shahid, McInnes, Colin R.
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Wave, 2021 This study is to investigate propulsion efficiency due to changes in draught of ship using data series and theoretical approach. A hard chain rescue boat with triplet screw was used for the study and to examine the effect of thrust deduction factor and ...
Muhammad Sawal Baital +3 more
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