The study on the effect of inlet disturbance body insertion on the flow pressure drop in a 90° square elbow

Putra, Randi Purnama; Sutardi,; Widodo, Wawan Aries

doi:10.1063/1.5046212

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…Experimental research on the effects of using a cylindrical, disturbing object placed near a flat plate wall has been carried out [19]. By altering the gap (g/d) between the cylinder and the wall, this experiment looks at the flow characteristics in the vicinity of the cylinder that is put close to the wall.…”

Section: Energymentioning

confidence: 99%

Experimental investigation of turbulent flow through a square-sectioned duct and 90ᵒ square elbow by using circular turbulator

Putra,

Sutardi,

Widodo

et al. 2024

Eureka: PE

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The ducting system is made up of 90° elbows and a few other fittings and accessories in addition to straight ducts. The friction loss, separation loss, and secondary flow loss are the main causes of the pressure decrease in an elbow, and they all increase with the presence of elbows. Utilizing too much energy to propel the flow is a cost associated with pressure loss. The aim of this research is to investigate turbulent flow via 90° square elbows and a square-sectioned duct through experimental methods by adding a circular turbulator (CT) close to the elbow wall's inner radius. The Reynolds numbers (ReDh) used in this research are 1.6×104, 4.8×104, and 9.5×104, with average flow velocities of 2 m/s, 6 m/s, and 12 m/s. Circular turbulators are added to the inner walls with angular positions (α) of 5°, 10°, 15°, and 20°. The results showed that the turbulence intensity increased toward the inner radius wall of the elbow in ducting with CT. For this study, the flow within the ducting with the CT is generally more turbulent than the flow inside the ducting without the CT. By including CT, it was possible to reduce the overall pressure loss in ducting with an elbow. The pressure reduction at two ReDh values (1.6×104 and 4.8×104) was only lessened by CT positioned at α=10°, 15°, and 20° out of the four CT placements. Conversely, CT positioned at α=5° can only effectively mitigate pressure decrease at ReDh=1.6×104. CT installation cannot lessen the pressure drop that happens in the ducting at a value of ReDh=9.5×104. CT placement at the three α values often helps to lower the pressure drop in the ducting. Using the CT, positioned at α=15°, is the greatest strategy to reduce the overall pressure decrease

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Section: Energymentioning

confidence: 99%

Experimental investigation of turbulent flow through a square-sectioned duct and 90ᵒ square elbow by using circular turbulator

Putra,

Sutardi,

Widodo

et al. 2024

Eureka: PE

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“…Penggunaan bahan bakar fosil saat ini terus meningkat seiring dengan betambahnya pengguna kendaraan bermotor terutama di Indonesia, sedangkan cadangan bahan bakar fosil akan terus berkurang. Berbagai upaya dilakukan untuk mengurangi konsumsi bahan bakar fosil pada kendaraan, diantaranya adalah memodifikasi aliran masuk udara sehingga menghasilkan campuran yang lebih homogen dengan penambahan pengganggu pada saluran masuk [1] [2], serta mengoptimalkan sistem pendinginan pada mesin pembakaran dalam [3], akan tetapi upaya ini belum maksimal. Salah satu metode yang sangat efektif adalah penggunaan bahan bakar alternatif seperti gas alam, biogas, biodiesel dan etanol.…”

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Pengaruh Tekanan Injeksi Gas Terhadap Konsumsi Bahan Bakar dan Efisiensi Termal pada Mesin Diesel Dual Fuel

Yuvenda

Sudarmanta

Putra

et al. 2019

INVOTEK

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Penggunaan compressed natural gas (CNG) sebagai bahan bakar utama pada mesin diesel menyebabkan penurunan performa mesin terutama pada efisiensi termal. Hal ini dikarenakan peningkatan daya mesin yang dikonversi melalui proses pembakaran tidak sebanding dengan penambahan jumlah bahan bakar yang masuk ke dalam ruang bakar seiring dengan penambahan beban mesin. Tujuan dari penelitian ini adalah bagaimana mengoptimalkan tekanan injeksi gas CNG yang diinjeksikan ke dalam ruang bakar melalui port (intake manifold) dapat menurunkan konsumsi bahan bakar dan meningkatkan efisiensi termal pada mesin diesel dual fuel (DDF). Metode penelitian ini dilakukan secara eksperimen pada mesin DDF Diamond DI 800 dengan putaran konstan (1500 rpm). Variasi yang dilakukan adalah mengatur tekanan injeksi gas CNG yang masuk melalui port sebesar 1,5 bar, 2 bar dan 2,5 bar. Hasil yang diperoleh adalah pada tekanan injeksi gas CNG 2,5 bar dapat memberikan persentase subtitusi gas CNG rata rata sebesar 57,59%, sedangkan pada tekanan injeksi gas CNG 1,5 bar dapat menurunkan konsumsi bahan bakar spesifik (SFCdual) hingga sebesar 0,196 kg/HP.jam dan meningkatkan efisiensi termal rata-rata sebesar 3,57% dibandingkan dengan variasi lain, meskipun masih di bawah kondisi operasi mesin single fuel.

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Passive flow control in square duct and 90° elbow with circular turbulator at certain gaps

Putra¹,

Sutardi²,

Widodo³

et al. 2019

AIP Conference Proceedings

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The study on the effect of inlet disturbance body insertion on the flow pressure drop in a 90° square elbow

Cited by 3 publications

References 7 publications

Experimental investigation of turbulent flow through a square-sectioned duct and 90ᵒ square elbow by using circular turbulator

Experimental investigation of turbulent flow through a square-sectioned duct and 90ᵒ square elbow by using circular turbulator

Pengaruh Tekanan Injeksi Gas Terhadap Konsumsi Bahan Bakar dan Efisiensi Termal pada Mesin Diesel Dual Fuel

Passive flow control in square duct and 90° elbow with circular turbulator at certain gaps

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