<p>The&nbsp;self-propulsion&nbsp;simulations&nbsp;of&nbsp;JBC&nbsp;were&nbsp;performed&nbsp;in&nbsp;model&nbsp;and&nbsp;full&nbsp;scale&nbsp;with&nbsp;two&nbsp;approach:&nbsp;one&nbsp;is&nbsp;the&nbsp;other&nbsp;is&nbsp;the&nbsp;body&nbsp;force&nbsp;method&nbsp;using&nbsp;steady&nbsp;blade&nbsp;element&nbsp;theory&nbsp;(lift&nbsp;lines&nbsp;theory)&nbsp;and&nbsp;infinite&nbsp;blade&nbsp;propeller,&nbsp;the&nbsp;other&nbsp;is&nbsp;3-D&nbsp;discretized&nbsp;propeller&nbsp;method.&nbsp;All&nbsp;simulations&nbsp;were&nbsp;investigated&nbsp;using&nbsp;an&nbsp;in-house&nbsp;CFD&nbsp;code&nbsp;which&nbsp;is&nbsp;based&nbsp;on&nbsp;the&nbsp;finite&nbsp;difference&nbsp;method&nbsp;to&nbsp;discretize&nbsp;the&nbsp;governing&nbsp;equations.&nbsp;A&nbsp;dynamic&nbsp;overset&nbsp;technique&nbsp;was&nbsp;used&nbsp;and&nbsp;the&nbsp;any&nbsp;revolutions&nbsp;of&nbsp;propeller&nbsp;can&nbsp;be&nbsp;achieved&nbsp;in&nbsp;the&nbsp;simulation.&nbsp;In&nbsp;order&nbsp;to&nbsp;obtain&nbsp;the&nbsp;self-propulsion&nbsp;point,&nbsp;a&nbsp;PI&nbsp;speed&nbsp;controller&nbsp;was&nbsp;utilized&nbsp;to&nbsp;adjust&nbsp;the&nbsp;rate&nbsp;of&nbsp;revolutions&nbsp;of&nbsp;the&nbsp;propeller.&nbsp;To&nbsp;obtain&nbsp;self-propulsion&nbsp;factors,&nbsp;resistance&nbsp;and&nbsp;open&nbsp;water&nbsp;test&nbsp;are&nbsp;also&nbsp;computed.&nbsp;Thrust&nbsp;identity&nbsp;method&nbsp;was&nbsp;used&nbsp;to&nbsp;obtain&nbsp;wake&nbsp;fraction.&nbsp;The&nbsp;full&nbsp;scale&nbsp;total&nbsp;resistance&nbsp;coefficient&nbsp;was&nbsp;obtained&nbsp;according&nbsp;two&nbsp;extrapolation&nbsp;methods:&nbsp;the&nbsp;first&nbsp;is&nbsp;the&nbsp;ITTC&nbsp;1978&nbsp;recommended&nbsp;procedure,&nbsp;while&nbsp;the&nbsp;second&nbsp;is&nbsp;the&nbsp;extrapolation&nbsp;method&nbsp;based&nbsp;on&nbsp;Grigson&nbsp;friction&nbsp;line.&nbsp;Wake&nbsp;fraction&nbsp;was&nbsp;revised&nbsp;following&nbsp;ITTC&nbsp;recommended&nbsp;procedures&nbsp;in&nbsp;full&nbsp;scale.&nbsp;All&nbsp;the&nbsp;results&nbsp;of&nbsp;the&nbsp;simulation&nbsp;have&nbsp;a&nbsp;reasonable&nbsp;agreement&nbsp;with&nbsp;experimental&nbsp;results.&nbsp;The&nbsp;computational&nbsp;results&nbsp;presented&nbsp;in&nbsp;this&nbsp;paper&nbsp;also&nbsp;provide&nbsp;evidence&nbsp;to&nbsp;the&nbsp;full&nbsp;scale&nbsp;self-propulsion&nbsp;prediction&nbsp;ability&nbsp;of&nbsp;the&nbsp;in-house&nbsp;code.<br>
&nbsp;&nbsp;Keywords:&nbsp;CFD,&nbsp;self-propulsion,&nbsp;overset&nbsp;grid,&nbsp;body&nbsp;force&nbsp;method,&nbsp;discretized&nbsp;propeller&nbsp;model,&nbsp;full&nbsp;scale.</p>

Numerical Simulation of Full-Scale Ship Self-Propulsion for Japan Bulk Carrier

Paper Proceedings: https://asmedigitalcollection.asme.org/OMAE/OMAE2021/volume/85116

OMAE 2021

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