Numerical Investigation of Single and Multiple Impinging Synthetic Jets on the Flow Field and Heat Transfer at Low Orifice-to-Plate Distances НУМЕРИЧКО ИСПИТИВАЊЕ ПОЈЕДИНАЧНИХ И ВИШЕСТРУКИХ УДАРА СИНТЕТИЧКИХ МЛАЗОВА НА ПОЉЕ ПРОТОКА И ПРЕНОС ТОПЛОТЕ НА МАЛИМ РАСТОЈАЊИМА ИЗМЕЂУ ОТВОРА И ПЛОЧЕ

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Ergur E., Çalışır T.

FME Transactions, cilt.51, sa.3, ss.273-283, 2023 (ESCI) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 51 Sayı: 3
  • Basım Tarihi: 2023
  • Doi Numarası: 10.5937/fme2303273e
  • Dergi Adı: FME Transactions
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Scopus, Directory of Open Access Journals
  • Sayfa Sayıları: ss.273-283
  • Anahtar Kelimeler: computational fluid dynamics, electronics cooling, heat transfer, Impinging synthetic jet, low nozzle-to-plate spacing
  • Gazi Üniversitesi Adresli: Evet

Özet

In the present numerical study, the thermal performance and fluid flow properties have been investigated to show the effect of single-orifice and multiple-orifice impingement of synthetic jets for dimensionless orifice-toplate distance (H/D) of lower than one. Investigations have been done for an actuation frequency of f=500 Hz, 0.10 ≤ H/D ≤ 0.75, and dimensionless pitch ratio of 1.25 ≤ Do/D ≤ 1.75. The results were validated with experimental results from the literature, and a fair agreement was obtained. The results showed that at low nozzle-to-plate spacing, lower target plate temperatures could be obtained. It was observed that with the use of multiple orifices at especially higher Do/D higher heat transfer values are present. The study was performed to add knowledge to the electronics and aviation industries where high temperatures in small cavities occur.