METHOD FOR MAINTAIN PARTICLE CONCENTRATION WHEN TESTING A SPEED FIELD USING A PARTICLE IMAGE CURRENT METER IN A TOWING TANK, CAPABLE OF SPRAYING PARTICLES WHILE A TOWING CARRIER MOVES TO A STARTING POSITION FOR PERFORMING A NEXT TEST

摘要

PURPOSE: A method for maintain particle concentration when testing a speed field using a particle image current meter in a towing tank is provided to enhance the accuracy of a measurement because particle concentration within a measurement region in spite of the repetitive movement of a towing carrier.;CONSTITUTION: A method for maintain particle concentration when testing a speed field using a particle image current meter in a towing tank is as follows. A towing carrier is on standby at a starting position until a residual flow caused by a previous test is attenuated(1). A test is performed while the towing carrier moves. Particles are sprayed and distributed within the measurement region while the towing carrier moves to the starting position for performing a next test(2). The towing carrier repeats a standby step for performing the next test(3).;COPYRIGHT KIPO 2013;[Reference numerals] (1) Ready to start a towing carrier(standby until a residual flow caused by a previous test is attenuated); (2) Performing an inspection while moving a towing carrier(forward); (3) Moving to a starting position of performing a next inspection(backward); (AA,BB,CC) Towing carrier; (DD,EE) Towing carrier moving direction