Studi Eksperimen dan Numerik Pengaruh Penambahan Vortex Generator pada Airfoil NASA LS-0417

Ulul Azmi, Herman Sasongko
Submission Date: 2017-01-23 10:47:05
Accepted Date: 2017-03-17 10:12:42

Abstract


Separasi boundary layer merupakan fenomena penting yang mempengaruhi performansi airfoil. Salah satu upaya untuk menunda atau menghilangkan separasi aliran adalah meningkatkan momentum fluida untuk melawan adverse pressure dan tegangan geser permukaan. Hal ini mengakibatkan separasi aliran akan tertunda lebih ke belakang. Upaya tersebut dapat dilakukan dengan penambahan turbulent generator pada upper surface airfoil. Vortex generator (VG) merupakan salah satu jenis turbulent generator yang dapat mempercepat transisi dari laminar boundary layer menjadi turbulent boundary layer. Oleh karena itu, penelitian ini bertujuan untuk mengetahui pengaruh jarak penempatan dan ketinggian VG terhadap perkembangan turbulent boundary layer sehingga dapat meningkatkan performansi airfoil. Penelitian ini dilakukan dengan eksperimen dan numerik pada Re = 1.41x105 dengan angle of attack 16°. Benda uji yang digunakan adalah airfoil NASA LS-0417 dengan dan tanpa VG. Variasi jarak penempatan dan ketinggian VG yaitu x/c = 0.1; 0.2; 0.3; 0.4 (h) = 1 mm; 3 mm; 5 mm. Hasil yang didapatkan adalah variasi vortex generator paling optimal adalah vortex generator dengan x/c = 0.3 dan h = 1 mm dimana Nilai CL/CD mengalami kenaikan sebesar 14.337%.

Keywords


airfoil; angle of attack; vortex generator

References


Anand, U., Sudhakar, Y., Thileepanragu, R., Gopinathan, V.T., dan Rajasekar, R.. Passive Flow Control Over NACA0012 Aerofoil Using Vortex Generator. Proceedings of the 37th International Conference on Fluid Mechanics and fluid Power. FMFP10 – FP – 12 (Des, 2010).

Tebbiche, H., Boutoudj M.S. 2014. Optimized Vortex Generators in The Flow Separation Control around a NACA 0015 Profile. Proceedings of the 9th International Conference on Structural Dynamics (2014). Université Mouloud Mammeri, Portugal.

Shan, H., Jiang, L., Liu C., Love M., Maines B., 2008. Numerical Study of Passive and Active Flow Separation Control over a NACA0012 Airfoil. Department of Mathematics, University of Texas at Arlington, Arlington, TX 76019, United States. Computers & Fluids 37 (2008) 975–992.

Lengani, D., Simoni D., Ubaldi M., Zunino P., Bertini F., 2011. Turbulent Boundary Layer Separation Control and Loss Evaluation of Low Profile Vortex Generators. Università di Genova, Via Montallegro, Italy. Experimental Thermal and Fluid Science 35 (2011) 1505–1513.

Lin J.C. 2002. Review of Research on Low-Profile Vortex Generators to Control Boundary-Layer Separation. Progress in Aerospace Sciences 38 (2002) 389–420. Flow Physics and Control Branch, NASA Langley Research Center, USA.

McGhee, J. Robert et all. 1973. Low Speed Aerodynamic Characteristics of a 17-Percent-Thick Airfoil Section Designed for General Aviation Applications. Langley Research Center. Virginia.


Full Text: PDF

CC Licencing


Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).

Refbacks

  • There are currently no refbacks.


Creative Commons License
Jurnal Teknik ITS by Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Based on a work at http://ejurnal.its.ac.id/index.php/teknik.
Statistik Pengunjung