Effect of density variation on the dynamic characteristic of coaxial swirling jet flows

Ahmad Adzlan, Suguru Matsubara, Hiroshi Gotoda, Toshihisa Ueda

研究成果: Conference contribution

抄録

We experimentally investigated the effect of density variation on the dynamic behavior of coaxial co-rotating swirling jets, focusing on how the difference of density between the inner and outer jets affect the flow at a high swirl number. When the density of the inner jet is higher than that of the outer jet (ρ/ρo ≈ 1.64. Here, ρi and ρo is the density of the inner and outer jet respectively.), both large-scale vortical structure and stagnating flow is induced by the hydrodynamic shear layer instability become easier to form when compared to that obtained for the case of iso-density jet (ρ/ρo = 1). The velocity field at the inner swirl number, Si = 0.6 is obtained using the Particle Image Velocimetry (PIV) analysis. The velocity field shows the absence of velocity vectors pointing towards the jet core downstream of the CO2 jets stagnation point. In contrast, when the density of the inner jet is lower than that of the outer jet (ρ/ρo ≈ 0.15), the inner jet does not form a stagnating point even at a high inner swirl number (Si = 0.6), and does not significantly change in response to swirl of inner jet.

本文言語English
ホスト出版物のタイトル2010 14th International Heat Transfer Conference, IHTC 14
ページ675-679
ページ数5
DOI
出版ステータスPublished - 2010 12 1
イベント2010 14th International Heat Transfer Conference, IHTC 14 - Washington, DC, United States
継続期間: 2010 8 82010 8 13

出版物シリーズ

名前2010 14th International Heat Transfer Conference, IHTC 14
5

Other

Other2010 14th International Heat Transfer Conference, IHTC 14
CountryUnited States
CityWashington, DC
Period10/8/810/8/13

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

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