Experimental study of convective heat transfer under arrays of impinging air jets from slots and circular holes

Can M., Etemoglu A. B., Avci A.

HEAT AND MASS TRANSFER, cilt.38, sa.3, ss.251-259, 2002 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 38 Sayı: 3
  • Basım Tarihi: 2002
  • Doi Numarası: 10.1007/s002310100249
  • Dergi Adı: HEAT AND MASS TRANSFER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.251-259
  • Bursa Uludağ Üniversitesi Adresli: Evet

Özet

Impinging air jets are widely used in industry, for heating, cooling, drying, etc, because of the high heat transfer rates which is developed in the impingement region. To provide data for designers of industrial equipment, a large multi-nozzle rig was used to measure average heat transfer coefficients under arrays of both slot nozzles and circular holes. The aim of the present paper is to develop the relationship between heat transfer coefficient, air mass flow and fan power which is required for the optimum design of nozzle systems. The optimum free area was obtained directly from experimental results. The theory of optimum free area was analysed and good agreement was found between theoretical and experimental results. it was also possible to optimise the variables, to achieve minimum capital and running costs.