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All Journal Seminar Nasional Teknik Kimia Kejuangan Setrum : Sistem Kendali-Tenaga-elektronika-telekomunikasi-komputer JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Jurnal Ilmu Fisika Prosiding SNAST
Prima Dewi Permatasari
Politeknik Elektronika Negeri Surabaya
Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences

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Journal : Prosiding SNAST

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PENGARUH MODIFIKASI DOVETAIL-CROWN TIP PADA ROTOR TERHADAP PRESSURE RATIO KOMPRESOR AKSIAL MULTISTAGE Ibnu Samsul Kurniawan; Setyo Nugroho; Prima Dewi Permatasari
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

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Compressors are one type of turbomachinery to add energy of fluid and move fluid from one location to another. Axial compressor on gas turbine used to compress fluid to get the required pressure increase. Multiple-stage axial compressor have a high level performance, that is 70-80%. Compressor performance is related with energy utilization, the greater the energy loss, the lower the compressor performance. The biggest energy loss is caused by aerodynamic loss, stall phenomenon and tip clearance. Gap between casing and rotor can cause secondary flow, leakage flow and boundary scrapping. These three streams can cause energy losses and affect the pressure ratio produced by the compressor. One way to get better performance with add dovetail-crown tip modification on the rotor, with the aim of reducing energy loss on the tip clearance. Modification of dovetail-crown tip on the rotor that is, the airfoil profile extended 75% of tip clearance compressor, then given a square gap along the chord with a/b ratio of 1:3. The axial compressors that become the testing system have parameters: 0.5 degree reaction, three stage, stagger angle 24 °, NACA 65- (19) -10 blade profile. Based on the results, the addition of a modified tip blade in the form of a dovetail-crown tip can reduce energy losses by presenting an average reduction in energy losses of 11.9%. The results also show that the use of dovetail-crown tip modification can increase the compressor pressure ratio with an average percentage increase of 0.0219%.
STUDI NUMERIK PENGARUH PENAMBAHAN GUIDE VANES TERHADAP KINERJA CIRCULAR ELBOW Imam Santoso; Setyo Nugroho; Prima Dewi Permatasari
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

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Abstract

The use of curved pipes will cause a pressure drop that is greater than the straight pipe of the same length. This is because there is a large pressure difference between the outer wall and the inner wall, eventually blocking the flow of fluid in the pipe. Pressure drop (pressure drop) of this flow is caused by friction (friction loss), separation (separation) and secondary flow (secondary flow). One method that can reduce pressure on the 900 elbow with the guide vane. The test module is in the form of a circular elbow 900 with a radius ratio (rc / Dh) = 1.2217 without a guide vane and uses a variety of number of guide vane. Numerical research uses computational fluid dynamics (CFD) method using computational software ANSYS FLUENT 14.5 with ReDolds number 9.8x104 ReDh. Fluid in the form of air with an inlet speed is uniform. From the results of this study obtained pressure drop, contour preset coefficient, velocity vector and pathline to determine the fluid flow phenomenon passing through the circular elbow with the addition of one guide vane, two guide vane, three guide vane, and without guide vane as a reference the phenomenon of the addition of guide vanes . The addition of guide vane gives the effect of increasing pressure drop. The biggest increase in pressure drop was the addition of three guide vane with an increase of 45.54% compared to the reference. The magnitude of this pressure drop occurs due to an increase in fluid friction with guide vanes and vortices which block the mainflow in circular elbow.
Co-Authors Aprilliyanto, Bagas Ardianto , Mukhlas Arrad Ghani Safitra Aulia Arif Shalihuddin Erik Tridianto, Erik Firmansyah Adi Nugroho Hendrik Elvian Gayuh Prasetya, Hendrik Elvian Ibnu Samsul Kurniawan Imam Santoso Joke Pratilastiarso Lohdy Diana Lovyta Putri Adianti Nabila Haninda Az Zahra Nabila Haninda Azzahra Novan Ardhiyangga Novan Ardhiyangga Novan Ardhiyangga, Novan Prasetya, Hendrik Elvian Gayuh Pratilastiarso, Joke Pratilastiarso, Joke Putra, Firdaus Fhudoli Setyo Nugroho Sugit Triyono Sugit Triyono Sugit Triyono, Sugit Teguh Hady Ariwibowo Wahyu Pratama , Muhammad Syafii