Frictional Pressure Drop in Steam Generating Tubes : 2nd Report, Experimental Investigation of the Static Characteristics and the Dynamic Behavior

Abstract

The experimental results of static characteristics and dynamic behavior of frictional pressure drop in a long steam generating tube have been presented. The test section was made of 9.6 mm inside diameter and 42.74 m length boiler tube and was heated uniformly by alternating current. The static characteristics of the pressure drop expressed in dimensionless form agree well with the theoretical result decribed in the previous report and also with Thom's correlation. The experimental results of the dynamic behavior of the pressure drop with the change of inlet flow rates agree with theoretical results, and that with the change of heat input approximately agree with theoretical results except in the initial period. The experimental values of the time constants have been discussed.