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Keywords: drag reductionClose
Journal of Ship Research (2020)
Paper Number: SNAME-JSR-02190009
Published: 01 August 2020
... resistance, needing urgent attention to reduce the same. To reduce frictional resistance, the air has been used as lubricant, which is injected below the moving body known as Bubble Drag Reduction or the Air Lubrication System. In this article, results obtained from experimental investigations into drag...
Journal of Ship Research 63 (03): 206–218.
Paper Number: SNAME-JSR-2019-63-3-206
Published: 01 September 2019
... coating, a drag reduction by almost 3% has been predicted in the boundary layer along the hull model of a small search-and-rescue vessel. The trends of the numerical predictions have been confirmed in the experiments. 1. Overview Dolphins are able to sustain a swimming speed of about 9 m/sec across long...
Journal of Ship Research 58 (01): 30–42.
Paper Number: SNAME-JSR-2014-58-1-30
Published: 01 March 2014
...Bhat Nikhil Jagdish; Tay Zhi Xian Brandon; Tiaw Joo Kwee; Arun Kr. Dev Frictional drag reduction by microbubbles is a promising engineering method for reducing ship fuel consumption, especially for large, slow steaming vessels. Total resistance can be broken down into frictional drag and form drag...
Journal of Ship Research 55 (03): 196–207.
Paper Number: SNAME-JSR-2011-55-3-196
Published: 01 September 2011
...Eduard Amromin; Gabor Karafiath; Bryson Metcalf The goal herein is ship drag reduction by air bottom cavitation in the moderate range of Froude number Fr (0.4 < Fr < 0.65) in both calm water and in waves. A ship hull with a bottom niche terminating in a cavity locker/seal (suppressing cavity...
Journal of Ship Research 54 (02): 109–119.
Paper Number: SNAME-JSR-2010-54-2-109
Published: 01 June 2010
... reduced the skin drag by more than 95% over the extent of the cavity, including the cavity closure. drag reduction experiment flux beach gas injection method variation cavitation number cavity closure represent velocity partial cavity Upstream Oil & Gas air flux stable cavity closure...
Journal of Ship Research 51 (04): 326–337.
Paper Number: SNAME-JSR-2007-51-4-326
Published: 01 December 2007
.... Experimental and analytical studies were used to answer four critical questions: How suitable are the biopolymers for drag reduction on ships? What is the needed polymer consumption rate at a given level of drag reduction? What is the achievable polymer production rate that can be achieved by the microalgae...
Journal of Ship Research 51 (04): 313–325.
Paper Number: SNAME-JSR-2007-51-4-313
Published: 01 December 2007
... 2007. The Society of Naval Architects and Marine Engineers marine transportation naca-0015 hydrofoil ship research Upstream Oil & Gas partial cavitation oscillation Artificial Intelligence drag reduction cavity length passenger transportation frequency hydrofoil coefficient...
Journal of Ship Research 36 (01): 55–58.
Paper Number: SNAME-JSR-1992-36-1-55
Published: 01 March 1992
...Paul S. Granville A complete similarity-law analysis is developed for riblet drag reduction which results in a flat-plate drag formula. As an example, a design chart is developed for a particular riblet configuration from its empirical drag characterization. The riblet drag characterization is...
Journal of Ship Research 28 (03): 202–207.
Paper Number: SNAME-JSR-1984-28-3-202
Published: 01 September 1984
... consumption polymer solution drag reduction flow rate waterjet RPM Upstream Oil & Gas Efficiency investigation injection chemical flooding methods polymeric macromolecule thrust equation proceedings reduction shaft power Journal of Ship Research, Vol. 28, No. 3, Sept. 1984, pp. 202-207...
Journal of Ship Research 22 (04): 257–258.
Paper Number: SNAME-JSR-1978-22-4-257
Published: 01 November 1978
...], the injection technique , the location of the injection slit , and the rate of injection [1, 4, 5]. Previous tests  have also shown that the observed drag reduction does not necessarily increase linearly with the rate of injection of the polymer. Indeed, beyond a certain injection rate...
Journal of Ship Research 20 (03): 171–180.
Paper Number: SNAME-JSR-1976-20-3-171
Published: 01 September 1976
...Daniel H. Fruman; Marshall P Tulin The diffusion of a thin tangential jet of an aqueous solution of drag-reducing polymer injected into the water-turbulent boundary layer of a flat plate at a freestream Reynolds number, 3.6 × 107, and the accompanying drag reduction are investigated for a variety...
Journal of Ship Research 19 (04): 193–205.
Paper Number: SNAME-JSR-1975-19-4-193
Published: 01 December 1975
... of the exposition. 1 12 1975 1 12 1975 1975. The Society of Naval Architects and Marine Engineers Reservoir Surveillance drag reduction inception production logging Engineering Institute production control US government ASME tank conference cavitation hoyt cavitation...
Journal of Ship Research 17 (04): 227–240.
Paper Number: SNAME-JSR-1973-17-4-227
Published: 01 December 1973
...L. Landweber; M. Poreh For a flat plate moving in a dilute polymer solution, effects on boundary-layer characteristics, shear stress, drag reduction and maximum drag reduction are considered for polymers which satisfy the Meyer-Elata law. Results are derived from a model in which the velocity...
Journal of Ship Research 14 (02): 79–83.
Paper Number: SNAME-JSR-1970-14-2-79
Published: 01 June 1970
...Paul S. Granville The drag reduction due to polymer being emitted from a slot is analytically treated for the fourth stage for which the concentration boundary layer coincides with the momentum boundary layer. 1 6 1970 1 6 1970 1970. The Society of Naval Architects and Marine...
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