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

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

---

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

---