KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Author: search.filters.author.Noosomton, Jaruphant

Search Results

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Improvement of Discharge Flow Structure by Bluff-Body Insert and Size Reduction of a Mixed-Flow Irrigation Pump
    (2022-03-01)
    Wasinarom, Kittipass
    ;
    Boonchauy, Dachdanai
    ;
    Noosomton, Jaruphant
    ;
    Charoensuk, Jarruwat
    This paper concerns efficiency improvement of an 8-in. mixed-flow irrigation pump by modification of discharge flow channel. First, computational fluid dynamics (CFD) modeling was validated with the experimental results using an available pump. Next, an investigation on the hydrodynamics structure was carried out by CFD. The investigation revealed large recirculation around the inner annulus area next to the impeller exit plane and jet flow around the pipe wall. This leads to formation of a strong shear layer between jet and recirculation flow. Improvements were realized by reducing the impeller size by 10% to increase the flow cross-sectional area between the impeller exit plane and the tube wall to slow down the jet flow. Bluff body was introduced at the inner annulus adjacent to the discharge flow channel to alleviate a recirculation wake region. The operating speed of the scaled-down impeller was increased from 900 to 1,100 rpm to compensate for the scaling effect, and the blade angle was modified to cope with the change of inlet relative flow angle. Experimental study suggested that more than 10% improvement could be achieved through these modifications. The maximum efficiency of the proposed model was 42%, compared with the maximum efficiency of 37% for the conventional model.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    A method for design 3 blade type and testing optimum cavitation of tailing thai boat
    (2014-01-01)
    Noosomton, Jaruphant
    ;
    Charoensuk, Jarruwat
    This paper presents a method for optimized cavitation of 3-blade type ship propeller. Cavitation flow is investigated around ship propellers experimentally. Testing of two different types of new model propellers and local type propellers are performed in this study. A 3-blades, skew angle 20 degree, developed area 50 and 35, so called model A (B3-20-50), and model B (B3-20-35) respectively, and finally a local type propeller popular used among local fisherman are compared. The results are presented in characteristic curves are related pictures. Finally, the results ate discussed, Model A and B is investigated based on existing experimental results. In addition, model C is a comparison validation to non-optimum for used to shallow-fishery and tailing Thai boat. A practical method was achieved by combining a vortex lattice lifting method and lifting surface method. The optimum circulation distribution yielding the maximum lift-to-torque ratio was computed for given thrust and chord lengths along the radius of the propeller by dividing the blade into a number of panels extending from hub to tip. The radial distribution of bound circulation could be computed by a set of vortex elements that have constant strengths. The cavitation phenomenon is appear to monograph of model A and B the better model C (local type), such as, the cavitation prediction on a hydrofoil is carried out in both steady and unsteady states. The results show good agreement in comparison with available experimental data. Furthermore, the propeller cavitation breakdown is well reproduced in the proceeding. The overall values suggest that the present approach is a practicable tool for predicting probable cavitation on propellers during design processes.