抄録
An experimental study has been carried out for the developing flow in a curved 270 deg pipe without upsteam tangent. The flow patterns of main and secondary stream, and the distribution of the intermittency factor in pipe section are illustrated with figures and explanations are added on the process of phenomena in the streamwise direction and the transition from non-turbulence flow to turbulent flow. Also, the experimental results are compared with these of the curved pipe flow with upstream tangent and the influence of the upstream tangent on the curved pipe flow are examined.
