Pamukkale Univ Muh Bilim Derg. 2020; 26(1): 68-74 | DOI: 10.5505/pajes.2019.82150

Helikopter Pali Aþýnma Kalkanýndaki Katý Partikül Erozyon Davranýþýnýn Ýncelenmesi

Hasan Gedikli, Ýsmail Özen
Karadeniz Teknik Üniversitesi, Makine Mühendisliði Ana Bilim Dalý, Trabzon, Türkiye

Bu çalýþmada, AISI 1020 çelik ve Ti-6Al-4V titanyum alaþým malzemelerinin katý partikül (parçacýk) erozyon davranýþlarý deneysel ve sayýsal olarak incelenmiþtir. Deneyler farklý partikül çarpma hýzlarý (100, 127, 170, 210, 250 m/s) ve açýlarý (20, 30, 45, 60, 90°) için gerçekleþtirilmiþtir. Bununla birlikte ayný malzemelerin bir helikopter pali üzerinde kullanýlan aþýnma kalkanýndaki erozyon performanslarý, 0° hücum açýsý ve 230 m/s çarpma hýzý þartlarýnda sayýsal olarak belirlenmiþtir. Sayýsal erozyon analizleri Eulerian-Lagrangian yaklaþýmlý ayrýk faz metodu ve bir ampirik erozyon eþitliði kullanan ticari ANSYS_Fluent paket programý ile gerçekleþtirilmiþtir. Deneysel ve sayýsal sonuçlar birbiriyle karþýlaþtýrýlmýþ ve birbirlerine yakýn sonuçlar elde edilmiþtir. Ayrýca deneysel ve sayýsal sonuçlara göre AISI 1020 çeliði, Ti-6Al-4V alaþým malzemesine göre en iyi erozyon performansý sergilemiþtir.

Anahtar Kelimeler: Katý partikül erozyonu, Hesaplamalý akýþkanlar dinamiði, Helikopter pali, Aþýnma kalkaný, AISI1020, Ti-6Al-4V

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Investigation of Solid Particle Erosion Behaviour on Erosion Shield of a Helicopter Rotor Blade

Hasan Gedikli, Ýsmail Özen
Department of Mechanical Engineering, Karadeniz Technical University, Trabzon, Turkey

In this paper, solid particle erosion behaviors of AISI 1020 steel and Ti-6Al-4V titanium alloy materials were experimentally and numerically investigated. Experiments and numerical simulations were carried out for the conditions of different particle impact velocities (100, 127, 170, 210, 250 m/s) and angles (20, 30, 45, 60, 90⁰ ). Moreover, erosion performances on the erosion shield of a helicopter rotor blade of aforementioned materials were numerically determined for the angle of attack of 0⁰ and impact velocity of 230 m/s. Numerical erosion analyzes were performed with ANSYS_Fluent program using discrete phase method with Eulerian-Lagrangian approach and an empirical erosion equation while experimental erosion tests were conducted by MIL-STD-3033 standard. As a result, numerical results were in good agreement with the experimental data. In addition, AISI 1020 steel material exhibited better erosion performance than Ti-6Al-4V titanium alloy material.

Keywords: Solid Particle Erosion, Computational fluid Dynamics, Helicopter blade, Erosion shield, AISI1020, Ti-6Al-4V

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