Studi Numerik Pengaruh Posisi Splitter Blade terhadap Karakteristik dan Kavitasi Pompa Sentrifugal Putaran Tinggi

Oktavius, Dion Giovanni (2026) Studi Numerik Pengaruh Posisi Splitter Blade terhadap Karakteristik dan Kavitasi Pompa Sentrifugal Putaran Tinggi. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5007221114-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (5MB) | Request a copy

Abstract

Pompa sentrifugal merupakan mesin fluida yang paling luas penggunaannya di berbagai sektor industri, mulai dari pembangkit listrik hingga sistem distribusi air karena konstruksinya yang sederhana dan kemampuannya menghasilkan debit besar. Pada aplikasi putaran tinggi, upaya untuk memaksimalkan performa hidrolik seringkali dibatasi oleh risiko kavitasi yang dapat merusak komponen impeller dan menurunkan efisiensi secara drastis. Modifikasi geometri berupa penambahan splitter blade terbukti efektif untuk memperbaiki pola aliran dan meningkatkan kinerja pompa. Meskipun demikian, kajian mengenai pengaruh variasi posisi lingkar sudu splitter terhadap performa operasional sekaligus fenomena aliran dua fasa (kavitasi) masih sangat terbatas. Oleh karena itu, penelitian ini dilakukan untuk menganalisis secara mendalam pengaruh dari variasi posisi lingkar splitter terhadap karakteristik aliran dan kavitasi pada pompa sentrifugal putaran tinggi. Metode yang digunakan pada penelitian yaitu simulasi numerik berbasis Computational Fluid Dynamics (CFD) menggunakan perangkat lunak ANSYS Fluent. Tahapan penelitian dimulai dari fasa pre-processing yang meliputi pembuatan model geometri tiga dimensi pompa. Kemudian dilanjutkan dengan proses meshing atau diskritisasi domain fluida. Pada tahap processing, simulasi dijalankan dalam kondisi tunak (steady-state). Model turbulensi yang dipakai adalah k-omega SST dengan mengaktifkan model multiphase mixture (air dan uap air) yang dikombinasikan dengan model kavitasi Zwart-Gerber-Belamri (ZGB). Hasil simulasi menunjukkan bahwa variasi posisi splitter blade mempengaruhi karakteristik pompa, dimana konfigurasi Mid Splitter menghasilkan head tertinggi sebesar 93,74 m. Efisiensi tertinggi diperoleh konfigurasi SS Splitter yaitu 62,80%. Penambahan Splitter terbukti memperbaiki pola aliran di dalam impeller menjadi lebih stabil dan streamlined. Pada kondisi kavitasi, konfigurasi PS Splitter memiliki ketahanan terhadap head drop paling baik dibandingkan lainnya. Sedangkan untuk konfigurasi Mid Splitter dan SS Splitter yang mampu meningkatkan head, justru yang paling rentan terhadap head drop seiring dengan penurunan NPSHa.
====================================================================================================================================
Centrifugal pumps are essential fluid machines widely used across various industrial sectors, from power plants to water distribution systems, due to their simple construction and ability to handle high flow rates. In high-speed applications, efforts to maximize hydraulic performance are often limited by the risk of cavitation, which can damage impeller components and drastically reduce efficiency. Geometric modification through the addition of splitter blades has proven effective in improving flow patterns and enhancing pump performance. However, studies regarding the effect of splitter blade circumferential position on operational performance and two-phase flow phenomena (cavitation) remain very limited. Therefore, this research is conducted to perform an in-depth numerical analysis of the impact of varying the splitter’s circumferential position on the flow characteristics and cavitation of a high-speed centrifugal pump. The methodology used in this study is numerical simulation based on Computational Fluid Dynamics (CFD) using ANSYS Fluent software. The research stages begin with the pre-processing phase, which includes the creation of a three-dimensional geometric model of the pump, followed by the meshing process or discretization of the fluid domain. In the processing stage, the simulation is run under steady-state conditions. The turbulence model employed is k-omega SST, with the multiphase mixture model (water and water vapor) activated and combined with the Zwart-Gerber-Belamri (ZGB) cavitation model. The simulation results indicate that variations in the splitter blade position significantly affect the pump characteristics, with the Mid Splitter configuration producing the highest head of 93.74 m. The highest efficiency is achieved by the SS Splitter configuration at 62.80%. The addition of splitters is proven to improve the flow patterns within the impeller, rendering them more stable and streamlined. Under cavitation conditions, the PS Splitter configuration exhibits the best resistance to head drop compared to the others. In contrast, the Mid Splitter and SS Splitter configurations, despite their capability to increase the head, are found to be the most vulnerable to head drop as NPSHa decreases.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Karakteristik Pompa, Kavitasi, Metode Komputasi Fluida (CFD), Pompa Sentrifugal, Sudu Splitter, Pump Characteristics, Cavitation, Computational Fluid Dynamics (CFD), Centrifugal Pump, Splitter blade
Subjects:	T Technology > T Technology (General) > T57.62 Simulation T Technology > TJ Mechanical engineering and machinery > TJ903 Pumping machinery. T Technology > TJ Mechanical engineering and machinery > TJ919 Centrifugal pumps--Design and construction.
Divisions:	Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Dion Giovanni Oktavius
Date Deposited:	31 Jul 2026 08:40
Last Modified:	31 Jul 2026 08:40
URI:	http://repository.its.ac.id/id/eprint/140985

Actions (login required)

View Item