دراسة عملية لتأثير زاوية الميلان و المساحة السطحية لاسطوانة مزعنفة طولياً على معامل انتقال الحرارة بالحمل الحر في حيز مفتوح

الملخص EN

This study deals with heat transfer by free convection from the outer surface of two cylinders (Triangular & Rectangular shape fined cylinder 12-fins).

The experimental work was conducted with air as a heat transport medium.

The cylinders were fixed at different slope angles (0o, 30o, 60o, 90o) .The heat fluxes was (1310, 837, 470, 212, 53) W/m2.

Where heat transferred by convection and radiation.

The results show that heat transfer from the triangular finned cylinder is maximum at a slope angle (90o) and minimum at the slope angle (0o) with the range from [Ra = (1.54*107–1.57*108)].