用数值和实验方法研究带老板帽鳍片的风道式 Ka4-70 系列螺旋桨的特性

Q2 Mathematics

CFD Letters Pub Date : 2023-11-30 DOI:10.37934/cfdl.16.2.2441

Berlian Arswendo Adietya, I Ketut Aria Pria Utama, Wasis Dwi Aryawan, Dwi Wahyudi, Anis Kurniati Arifah, Baharuddin Ali, Bashofi Cahyo Buwono, Miftah, Warsito

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引用次数: 0

摘要

一般用于船舶推进的非常规系统是管道推进器。最近，人们利用中等保真度的计算流体动力学代码（基于势流假设）对这些设备进行了研究，并取得了可喜的成果。对管道螺旋桨和 PBCF 进行了数值和实验比较，并对使用管道螺旋桨和 PBCF Divergent 组合的螺旋桨 Ka4-70 进行了案例研究。研究采用计算流体动力学（CFD）方法进行数值计算。求解器基于雷诺平均纳维-斯托克斯（RANS）解决方案和湍流建模显式代数应力模型（EASM）。测试数据来自 CFD 模拟，包括开放式螺旋桨和喷嘴加 PBCF 组合，但实验仅针对喷嘴和 PBCF。所有测量均在 J = 0 到 J = 1.0 之间进行，速度从 0 米/秒到 2.445 米/秒。对带有喷嘴 19A 和 PBCF Divergent 的 Ka4-70 螺旋桨进行的数值分析和实验分析的对比研究结果表明，CFD 和实验之间存在以下几种现象。(i) 不带喷嘴 19A 和 PBCF 分歧器的 Ka4-70 螺旋桨在低速 J = 0.1 至高速 J = 0.7 时压力较大，但带喷嘴和 PBCF 分歧器的 Ka4-70 螺旋桨在 J = 0.1 至 J = 0.5 时压力最大；(ii) 带喷嘴 19A 和 PBCF 分歧器的 Ka4-70 螺旋桨在低速 J = 0.1 至高速 J = 0.7 时压力较大，但带喷嘴和 PBCF 分歧器的 Ka4-70 螺旋桨在 J = 0.1 至 J = 0.5 时压力最大。5 时达到最高压力；(ii) 不带 19A 喷嘴和 PBCF 发散器的 Ka4-70 螺旋桨提高了叶片上盖鳍片的流速，但没有提高轴向诱导速度，而使用喷嘴和 PBCF 发散器的 Ka4-70 螺旋桨提高了叶片的轴向诱导速度，但没有提高叶片上盖鳍片的流速；(iii) 不使用喷嘴和 PBCF 的 Ka4-70 螺旋桨，当以喷嘴和 PBCF 形式加入 ESD 时，当 J 高时，螺旋桨 η0 至 12% 的值增加，从 J = 0.(iv) 采用喷嘴 19A 和 PBCF Divergent 的 Ka4-70 螺旋桨从 J=0 到 J=1.0 的 η0 非常相似。因此，采用 CFD 方法进行整体模拟仍然是合适的。

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Characteristics Investigations of Ducted Ka4-70 Series Propeller with Boss Cap Fins Using Numerical and Experimental Method

Unconventional system that are generally adopted for ship propulsion are Ducted Propellers. These devices have recently been studied with medium-fidelity computational fluid dynamics code (based on the potential flow hypothesis) with promising results. Numerical and experimental comparison of ducted propeller with PBCF, case studies with Propeller Ka4-70 used combination ducted and PBCF Divergent. The study was done numerically using computational fluid dynamics (CFD) approach. The solver is based on the Reynolds-Averaged Navier-Stokes (RANS) solutions and turbulence modelling explicit algebraic stress model (EASM). The test data was obtained from CFD simulations consisting of the open propeller and combination Nozzle plus PBCF, but the experiment was done to Nozzle and PBCF only. All measurements were carried out from J = 0 to J = 1.0 with speeds from 0 m/s to 2.445 m/s. The results of the comparative investigation cases between numerical and experiment analysis from Ka4-70 propellers with Nozzle 19A and PBCF Divergent appears that between CFD and experiments, several phenomena are seen. (i) the Ka4-70 propeller without Nozzle 19A and PBCF divergent experienced large pressure at low-speed J = 0.1 to high-speed J = 0.7, but Ka4-70 propeller with Nozzle and PBCF divergent reach highest pressure at J = 0.1 to J = 0.5; (ii) the Ka4-70 propeller without 19A nozzle and PBCF divergent increases the flow velocity at the boss cap fins but does not increase the axial induce velocity, while Ka4-70 propeller using nozzle and PBCF divergent increases the axial induce velocity of the blade, but does not increase the flow velocity of the boss cap fins; (iii) Ka4-70 propeller without Nozzle and PBCF value increase of propeller η0 to 12% when ESD added in the form of Nozzle and PBCF when J is high, from J = 0.7 to J = 1.0. ; (iv) Ka4-70 propellers with Nozzle 19A and PBCF Divergent has very similar η0 from J=0 to J=1.0. CFD approach are still appropriate to be relied upon for the overall simulation.

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来源期刊

CFD Letters Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

3.40

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0.00%

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