Download or read book Cavitation and Flow Visualization Investigations on Two Model Propellers written by Stuart D. Jessup and published by . This book was released on 1985 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cavitation and Flow Visualization Investigation on Two Model Propellers written by S. D. Jessup and published by . This book was released on 1985 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments are described in which flow visualization and cavitation tests were conducted with two 24-inch diameter propeller models in the Center's 36-inch water tunnel. Flow visualization was performed using oil flow techniques and tufts to investigate possible flow separation on the blade surface. Cavitation tests were conducted to correlate with previously conducted surface pressure measurements. Results showed no indication of turbulent flow separation at the outer radii, and good qualitative comparisons between measured pressures and cavitation results. Originator supplied keywords: Marine propeller; Propeller cavitation; Flow visualization; Pressure distribution; Viscous flow; Oil film technique.
Download or read book Further Measurements of Model Propeller Pressure Distributions Using a Novel Technique written by Stuart D. Jessup and published by . This book was released on 1986 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Model propeller blade pressure distributions were measured using a novel technique. A single pressure gage was installed at a radial position to measure pressures at numerous chordwise locations through pressure taps and connecting channels. The technique resulted in accurate, detailed pressure distributions along two radial positions using two pressure gages. The major advantage of this technique is the ability to make measurements in the thin parts of the blade with high potential accuracy, and no disruption to the measuring surface, except for the orifice hole. The relatively along test time required to collect the data is the disadvantage. Keywords: Marine Propeller, Propeller Research Pressure Distribution, Model Experiments.
Download or read book Twenty Fourth Symposium on Naval Hydrodynamics written by National Research Council and published by National Academies Press. This book was released on 2003-11-15 with total page 1018 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is part of a series of reports that summarize this regular event. The report discusses research developments in ship design, construction, and operation in a forum that encouraged both formal and informal discussion of presented papers.
Download or read book Report written by United States. National Bureau of Standards and published by . This book was released on 1966 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Hydraulic Laboratory Research in the United States written by and published by . This book was released on 1966 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydraulic Research in the United States written by and published by . This book was released on 1966 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NBS Special Publication written by and published by . This book was released on 1966 with total page 844 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book National Bureau of Standards Miscellaneous Publication written by and published by . This book was released on 1956 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cavitation Erosion Experiments in Blocked Flow with Two Ice class Propeller Models written by J. Michael Doucet and published by . This book was released on 1996 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Miscellaneous Publication National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1934 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of the Viscous Flow Around Two Model Propellers in Uniform Inflow written by Anders Smærup Olsen and published by . This book was released on 2001 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation Into the Propeller Cavitation in Oblique flow written by Kaname Taniguchi and published by . This book was released on 1964 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three propeller models of high speed crafts were tested in both axial and oblique-flow conditions in a cavitation tunnel. The test results show that there are decreases in K sub T, K sub Q and e sub p in oblique-flow condition and that the decreases of K sub T and K sub Q are approximately proportional to the angle of inclination squared. The cavitation patterns on a blade varied considerably with its angular position due to the local variation of angle of incidence of the blade section. Using these test results, the sea trial results of the corresponding actual boats were analyzed. Considerable improvement was attained in model-ship correlation using the experimental results in oblique-flow condition, compared to the ordinary method using the axial-flow data. (Author).
Download or read book Cavitation and Bubble Dynamics written by Phoevos Koukouvinis and published by Elsevier. This book was released on 2021-09-24 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cavitation and Bubble Dynamics: Fundamentals and Applications examines the latest advances in the field of cavitation and multiphase flows, including associated effects such as material erosion and spray instabilities. This book tackles the challenges of cavitation hindrance in the industrial world, while also drawing on interdisciplinary research to inform academic audiences on the latest advances in the fundamentals. Contributions to the book come from a wide range of specialists in areas including fuel systems, hydropower, marine engineering, multiphase flows and computational fluid mechanics, allowing readers to discover novel interdisciplinary experimentation techniques and research results. This book will be an essential tool for industry professionals and researchers working on applications where cavitation hindrance affects reliability, noise, and vibrations. Covers a wide range of cavitation and bubble dynamics phenomena, including shock wave emission, jetting, and luminescence Provides the latest advice about applications including cavitation tunnels, cavitation testing, flow designs to avoid cavitation in pumps and other hydromachinery, and flow lines Describes novel experimental techniques, such as x-ray imaging and new computational techniques
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1993 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Detailed Study of the Flowfield of a Submarine Propeller During a Crashback Maneuver written by and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An extensive study of crashback was performed in the U.S. Navy's William B. Morgan Large Cavitation Channel (LCC), located in Memphis, TN. Propeller 4381 was attached to a standard axisymmetric submarine hull model (DTMB Model 5495-3) which was then suspended in the LCC. Forces and moments were measured on both the body and the propeller for steady and unsteady crashback conditions. The unsteady conditions were simulated by allowing the propeller to "windmill" in the forward direction and then engaging the propeller in the reverse direction, with the tunnel velocity held constant. Forces and moments were measured during the change in propeller speed. A further simulation was undertaken whereby the tunnel motor was shut off once the windmilling propeller engaged in reverse rotation and the tunnel speed was allowed to coast down to zero. Forces and moments were measured during this simulation also. Laser Doppler velocimeter (LDV) measurements of the flow field around the propeller during steady crashback were obtained in addition to extensive flow visualization measurements. The dimensionless force and moment data were found to collapse when plotted against the ratio of the actual propeller speed to the propeller speed required for self propulsion in forward motion. The force and moment coefficients were found to have a local maximum when this ratio was around -0.8. Unsteady crashback maneuvers also were investigated with two different types of simulations in which the propeller and tunnel speeds were allowed to vary. In some cases the peak off-axis force and moment coefficient magnitudes exceeded those observed during the steady crashback measurements. The LDV studies showed that the ring vortex structure appeared to migrate upstream and outward as the reverse propeller speed increased in magnitude. (145 figures, 17 refs.).
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
