PEMODELAN TEORITIS ALIRAN SEKUNDER DAN VALIDASI EKSPERIMENTAL PADA KOMPRESOR AKSIAL DENGAN KOMPRESOR CASCADE
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Published:
Apr 1, 2010
Keywords:
Kompresor Aksial, Aliran sekunder, sudut turning (Δβ2), ratio kecepatan aksial (AVR), koefisien kenaikan tekanan (Cp).
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Abstract
Salah satu usaha untuk memprediksi kenaikan tekanan pada suatu desain kompresor aksial dilakukan dengan pemodelan teoritis deviasi sudut turning serta AVR. Pemodelan ini menggunakan teori aliran sekunder di dalam cascade oleh [Marsh H dan Glynn D], dimana aliran viscous tiga dimensi yang melintasi blade passage dianggap sebagai aliran non-viscous tetapi mengandung vorticity. Di daerah inlet boundary layer, vorticity ini berasal dari normal vorticity dan streamwise vorticity. Akibat perbedaan waktu tempuh partikel yang melintasi suction side dan pressure side maka vorticity di inlet akan terlihat sebagai secondary vortex pada normal exit cascade. Melalui persamaan integrasi teori aliran sekunder didapatkan persamaan matematis deviasi outlet angle (Δβ2), axial velocity ratio, hingga algoritma pemrograman komputer. Sebagai analisis hasil, selanjutnya dibandingkan dengan eksperimen yang dilakukan oleh Sasongko H. Tentunya dengan blade geometry, cascade configuration yang sama. Hasil yang diperoleh secara keseluruhan menunjukkan adanya kesesuaian yang baik antara teori dengan eksperimen. Namun ada sedikit perbedaan terutama di daerah yang berkaitan dengan pengaruh separasi aliran tiga dimensi.
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How to Cite
Suryadi, A. (2010). PEMODELAN TEORITIS ALIRAN SEKUNDER DAN VALIDASI EKSPERIMENTAL PADA KOMPRESOR AKSIAL DENGAN KOMPRESOR CASCADE. AUSTENIT, 2(01). https://doi.org/10.5281/zenodo.4544120
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References
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3. Storer, J.A.1991, ”Tip Clearance Flow in Axial Compressor,” PhD Dissertation University of Cambridge.
4. Kang, S. 1993,” Investigation on Three Dimensional within a Compressor Cascade with and without Tip Clearance,” PhD thesis Vrije Universiteit Brussel, Belgium.
5. Hubner, J. 1991,”Experimentelle und Theoretische Unterschung der Wesettichen Einflusfaktoren Auf die Spalt-und Sekunder Stromung in ”, Dissertation Universitat der Brundeswehr, Munchen.
6. Sasongko, H.1997, ”Rand und Spaltstromungen in Stark gestaffelten Verdichtergitter aus Schwach gewolbten Profilen,” ZLR-Forschungsbericht 01.
7. Stark, U. 1989,” Experimentelle Untersuchungen Zum Einflus des Staffelungswinkels Auf die Sekunder Stromungen in ebenen Verdichtergitten”, Forch. Ing- Wes-Bd.55 Nr.5,S.135/148.
8. Stark, U. and Bross, S. 1996,” Endwall Boundary Layer Separation and Loss Mechanism in Two Compressor of Different Stagger Angle,”agrad CP-
571,s.1-1/1-14.
9. Sven Baumgarten 1993, Sekundarstromungsmessungen an einem schwach gestaffelten Verdichtergitter, Diplomarbeit am, Institut fur Stromungsmechanik der Technischen Universitat Braunschweig, Germany.
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11. Horlock, J.H. 1973, Axial Flow Compressor, Robert E. Krieger, Publishing Company Huntington, New York.
12. Anderson JR, John,D, 1988, Fundamentals of Aerodynamics, 3rd McGraw-Hill International Book Company,
Singapore.
13. Shames, I.H 1992, Mechanics of Fluid 3th, McGraw-Hill, International Book Company, Singapore.
14. Robert W Fox & Alan T. McDonald
1994, Introduction to Fluid Mechanics 4th, John Wiley & Sons, Inc, Singapore.
15. Schlichting, H, “Berechnung der reibungslosen inkompressiblen stroemung fuer ein vorgegebenes ebenes schaufelgitter”, VDI Forschungsheft, Band 21,
1995.
16. Gieseng, J P, 1968,” Solution Of The Flow Field About One Or More Airfoils Of Arbitrary Shape In Uniform Or Nonuniform Flows By The Douglas- Neumann Method”, Report of IRDP of Douglas Aircraft Company, N0. LB 31946,
17. Sasongko, H, 2001, ”Three Dimentional Flow Separation Near Rotor Hub OF Axial Compressor”, Journal Teknik Mesin N0.2, volume 1, hal 55-
56, ITS.