Abstract The main function of the fin stabilizer on patrol boats is anti-rolling and providing comfort for ship personnel. However, installation has a consequence in form appendage resistance ship. This study analyzes magnitude due to NACA 0010 mounted 60m boat at an angle 0º. Reduction expected improve performance which then can optimize use fuels minimize pollution. In early stages, bare hull...

Increasing of head rise (HR) and decreasing of head loss (HL), simultaneously, are important purpose in the design of different types of fans. Therefore, multi-objective optimization process is more applicable for the design of such turbo machines. In the present study, multi-objective optimization of Forward-Curved (FC) blades centrifugal fans is performed at three steps. At the first step, He...

An alternative to experiments is the use of numerical model tests, where performances ships can be evaluated entirely by computer simulations. In this paper, free surface viscous flow around a bare hull simulated with three Computational Fluid Dynamics (CFD) software packages (FINE Marine, ANSYS CFD and SHIPFLOW) compared results obtained during experimental tests. The studied Duisburg Test Cas...

An axial compressor has high efficiency under design conditions, but its stable working range is narrow. Adjusting the rotational speed can effectively expand range. In this paper, a five-stage for specific compressed air energy storage (CAES) system taken as research object, and different (DRS) characteristics are studied with NUMECA software. Firstly, influence of DRS on overall aerodynamic p...

The performance of the turbocharger can be improved by optimizing structural parameters compressor impeller. In this work, existing centrifugal impeller was taken as case study, and line shape hub modified in order to study influence curvature on performance. Furthermore, Navier–Strokes flow equation fourth-order Runge–Kutta method were used with Numeca software solve steady-state RANS equation...

The increasing performance of modern aeroengines led the research towards optimization machine components not deeply analyzed in past. In this context, mechanisms driving interaction process between secondary flows evolving at hub low-pressure turbines with rotor-stator cavity systems have been poorly investigated literature. work, an experimental and numerical analysis endwall near wall flow l...

This paper presents a comprehensive validation and verification study of turbomachinery Reynolds-averaged Navier-Stokes flow solvers on the transonic axial compressor TUDa-GLR-OpenStage. Two commercial namely Ansys CFX Numeca FineTurbo are adopted to provide benchmark solutions, which can be used for other RANS in future. Based these solvers, five sets grids, two advection schemes (i.e., centra...

Gas turbine engines are highly intricate machines, and every component of them is closely associated with one another. In the traditional engine developing process, vast experiment tests needed. To reduce unnecessary trials, a whole gas simulation extremely For this purpose, compressor tool now developed. Considering inherent drawbacks 0D analysis 3D CFD (Computational Fluid Dynamics) calculati...

Determining the main dimensions of small vessels while designing is an important and difficult task due to large number mutually exclusive factors affecting hydrodynamic characteristics such vessels. The existing patterns for determining length, width draft are quite general. This complicates their usage vessel a specific design. In this case, it necessary check technical solutions, one ways th...

توربین­های محوری با توجه به ارتفاع کم و دبی زیاد کاری، توانایی به کارگیری زیادی در کشور ما دارند. بخصوص در ظرفیت­های کم و بصورت تولید پراکنده و مجزای شبکه. در این مقاله یک توربین محوری که محدوده­ی دبی 50 لیتر در ثانیه تا 150لیتر در ثانیه را پوشش می­دهد، طراحی شده است که برای ارتفاع­های بین 2 تا 5 متر،  مناسب می­باشد. طراحی اولیه با تدوین نرم­افزاری انجام شد به شکلی که با دادن ارتفاع و دبی آب به...