Yazar
Glowienko, R., Derlien, H., Ertunç, Özgür, Delgado, A.
Basım Tarihi
2019-04
Basım Yeri
-
IOP Publishing
Konu
Synthetic jets, CFD, Turbulence
Tür
Süreli Yayın
Dil
İngilizce
Dijital
Evet
Yazma
Hayır
Kütüphane
Özyeğin Üniversitesi
Demirbaş Numarası
0169-5983
Kayıt Numarası
8ddda428-837b-4011-8fae-d7df8b8a7843
Lokasyon
Mechanical Engineering
Tarih
2019-04
Örnek Metin
In this paper, flow characteristics and the transition of synthetic jets are investigated numerically and experimentally. The investigated synthetic jets have a dimensionsless stroke length L-0/d of 146 and 167, an U-0 of 7.3 and 8.35 m s(-1) and a jet Reynolds number Re-U0 of 471 and 539. Novelty of this paper is the extensive analysis and explanation of why synthetic jets with L-0/d > 70 result to transition and turbulent flow: it is shown that the jets exhibit swirl which originates from the cavity. The rotation results in more rapid divergence and deceleration of the free jets. Both processes initially cause disruptions of the primary vortex and the secondary vortices, also vortex breakdown, and ultimately result in jet turbulence. Extension of the laminar region spatially and temporally is possible by increasing the height of the cavity.
DOI
10.1088/1873-7005/aaf498
Cilt
51
