Experimental research on marine podded propulsors
نویسندگان
چکیده
منابع مشابه
Large Eddy Simulation of Marine Propulsors in Crashback
Flow around a marine propulsor under crashback operating condition is computed using the large eddy simulation methodology. The incompressible NavierStokes equations are simulated in a rotating frame of reference that rotates with the propulsor. A nondissipative and robust finite volume method developed by Mahesh et al. (2004) is used on unstructured grids. The simulation yields good mean value...
متن کاملشبیهسازی عملکرد هیدرودینامیکی پیش‌برنده‌های دریایی با کمک روش ترکیبی تئوری مومنتوم المان پره و حل معادلات متوسط‌گیری شده ناویر- استوکس
Hydrodynamic analysis of the marine propulsors with complex geometry such as podded drive systems, ducted propellers, and waterjet systems are more complicated than conventional propeller systems. This fact has caused the usage and development of numerical methods and techniques. The hybrid method to couple the Blade Element Momentum Theory (BEMT) with Reynolds-Averaged Navier Stokes method (RA...
متن کاملLarge Eddy Simulation of the Effect of Hull on Marine Propulsors in Crashback
Presence of the hull significantly increases the sideforces on a propulsor in crashback below J=-0.7 (Bridges, 2004). Large Eddy Simulation (LES) reproduces the experimentally observed behavior. LES is performed for an open propulsor with and without hull at two advance ratios, J=-1.0 and J=-0.5. At J=-1.0, two noticeable flow features are found with the hull a recirculation zone upstream in th...
متن کاملPassive cambering and flexible propulsors: cetacean flukes.
The flukes are the primary locomotor structure in cetaceans, which produce hydrodynamic thrust as the caudal vertebrae are oscillated dorso-ventrally. Effective thrust generation is a function of the kinematics of the flukes, the angle of attack between the flukes and the incident water flow, and the shape of the flukes. We investigated the effect of bending within the caudal region of odontoce...
متن کاملDeterioration of Concrete in Ambient Marine Environment (RESEARCH NOTE)
Structural concrete exposed to marine environment deserves special attention as the diffused sea salts chemically react with harden cement matrix and forms various expansive/leachable compounds leading to loss of material, strength, cracking, spalling etc. This study cover the effect of sea water on the specimens cast from two grades of concrete exposed to simulated marine environment over a ye...
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ژورنال
عنوان ژورنال: Journal of Naval Architecture and Marine Engineering
سال: 1970
ISSN: 2070-8998,1813-8535
DOI: 10.3329/jname.v4i2.989