Studi Numerik Perilaku Aliran Fluida Pada Pompa Sentrifugal Tipe Closed Impeller Dengan Variasi Kecepatan Putar Dan Debit Pompafirst

Setiawan, Ihsan Rifanaldi (2023) Studi Numerik Perilaku Aliran Fluida Pada Pompa Sentrifugal Tipe Closed Impeller Dengan Variasi Kecepatan Putar Dan Debit Pompafirst. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pompa sentrifugal adalah komponen penting dalam pemindahan cairan di berbagai aplikasi industri dan komersial. Pompa sendiri adalah salah satu mesin fluida yang paling banyak digunakan. Seluruh pompa sentrifugal dirancang untuk beroperasi optimal pada tingkat aliran, head, dan kecepatan tertentu, kinerjanya dapat sangat berkurang saat beroperasi di bawah kondisi off-design. Ini menyebabkan efisiensi yang berkurang dan peningkatan konsumsi energi, sehingga modifikasi off-design pompa sentrifugal menjadi area penelitian yang penting. Kecepatan putar (RPM) pompa sentrifugal memainkan peran penting dalam menentukan karakteristik performanya. Peningkatan kecepatan putar meningkatkan laju aliran dan tekanan yang dihasilkan oleh pompa, tetapi juga meningkatkan konsumsi daya ataupun menurunkan efisiensi pada titik operasional tertentu.
Simulasi off-design dari pompa sentrifugal adalah masalah yang kompleks yang melibatkan beberapa faktor, seperti geometri pompa, sifat fluida, dan kecepatan rotasi. Kinerja pompa dalam kondisi-kondisi ini dapat diprediksi melalui simulasi Computational Fluid Dynamics (CFD), yang dapat memberikan pemahaman yang detail tentang fenomena aliran dalam pompa. Penelitian numerik ini menggunakan geometri pompa yang didasarkan pada penelitia-penelitian sebelumnya yang telah dilakukan sebanyak tiga kali oleh A. Meakhail, Abo Elyamin et al., serta Damanik & Waluyo dengan peranti lunak FLUENT untuk meninjau fenomena aliran fluida yang terjadi serta head maupun efisiensi pada variasi operasi off-design flowrate maupun kecepa1tan putaran dari pompa yang diteliti. Hasil menunjukkan bahwa variasi flowrate dibawah efisiensi terbaik menunjukkan peningkatan intensitas vortex pada kapasitas yang semakin kecil. Sementara itu headloss pada peningkatan kapasitas disebabkan dominan karena kerugian gesekan. Titik-titik yang diambil sesuai bukaan menurut Affinity Law pada kecepatan putaran berbeda menunjukkan perilaku serta nilai efisiensi yang serupa
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Centrifugal pumps are critical components in the transfer of fluids across a wide range of industrial and commercial applications. The pump itself is one of the most widely used fluid machines. While all centrifugal pumps are designed to operate optimally at specific flow levels, heads and speeds, their performance can be greatly reduced when operating under off-design conditions. This leads to reduced efficiency and increased energy consumption, making off-design modification of centrifugal pumps an important area of research. The rotating speed (RPM) of a centrifugal pump plays an important role in determining its performance characteristics. An increase in rotational speed increases the flow rate and pressure generated by the pump, but also increases power consumption or decreases efficiency at certain operational points. Off-design simulation of centrifugal pumps is a complex problem involving several factors, such as pump geometry, fluid properties, and rotational speed. Pump performance under these conditions can be predicted through Computational Fluid Dynamics (CFD) simulations, which can provide a detailed understanding of flow phenomena in pumps. This numerical study uses a pump geometry based on three previous studies by A. Meakhail, Abo Elyamin et al., and Damanik & Waluyo with FLUENT software to review the fluid flow phenomena that occur as well as head and efficiency at variations of off-design operating flowrate and rotation speed of the pump under study. The results show that flowrate variations below the best efficiency show an increase in vortex intensity at increasingly smaller capacities. Meanwhile, the headloss at increased capacity is predominantly due to friction losses. The points taken according to the opening according to Affinity Law at different rotation speeds show similar behavior and efficiency values.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Pompa Sentrifugal, Off-design, Kecepatan Putar, Fenomena Aliran, CFD; Centrifugal Pump, Off-design, Rotational Speed, Fluid Flow Behavior, CFD
Subjects:	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 and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Ihsan Rifanaldi Setiawan
Date Deposited:	14 Sep 2023 02:50
Last Modified:	14 Sep 2023 02:51
URI:	http://repository.its.ac.id/id/eprint/102581

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