METHOD FOR EFFECTIVELY SPRAYING PARTICLES WITHIN A MEASUREMENT REGION THROUGH A COMPUTATIONAL FLUID DYNAMICS ANALYSIS USING A PARTICLE IMAGE CURRENT IN A TOWING TANK, CAPABLE OF EASILY REGULATING PARTICLE CONCENTRATION WITHIN A MEASUREMENT REGION CORRESPONDENTLY TO A VARIABLE TEST CONDITION

摘要

PURPOSE: A method for effectively spraying particles within a measurement region through a computational fluid dynamics analysis using a particle image current in a towing tank is provided to save an amount of consumed particles because the particles are needed to spray to an upstream point of a flow not to other points.;CONSTITUTION: A method for effectively spraying particles within a measurement region through a computational fluid dynamics analysis using a particle image current in a towing tank is as follows. A flow analysis is performed by using a computational fluid dynamics under a condition same with a flow measurement test condition using a particle image current meter in a towing tank(6). An upstream point(3) of a flow flowing into a measurement region(2) through an assumed fluid flow is grasped. The upstream point is determined as a particle spraying region(4). The upstream point of the flow is a region where moving a flow line passing through the measurement region along the upstream direction. Most of particles existing in the upstream point flow into the inside of the measurement without being distributed to other regions. The particles existing in other regions except for the upstream point nearly flow into the inside of the measurement region.;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Towing carrier moving direction