ENGINE STARTING DURING THE BENCH TESTING PARAMETERS EXPERIMENTAL DETERMINATION METHOD

摘要

FIELD: engines and pumps; test equipment.;SUBSTANCE: engine starting during the bench testing parameters experimental determination method, based on the test conducting and the article thrust diagram registration with the two-bridge force measuring sensor. In the igniter operation period prior to the tested engine charge ignition start, using the force-measuring sensor first bridge recording the thrust diagram with the typical sampling frequency, and using the force-measuring sensor second bridge recording the acoustic wave processes parameters in the engine charge channel with the sampling frequency proportional to the speed of sound in the charge channel ratio to the engine charge channel doubled length, and, according to the measured by the force-measuring sensor second bridge diagram, determining the acoustic wave processes parameters: force disturbances, as the acoustic oscillations amplitudes values; pressure change in acoustic waves, as the power disturbances ratio to the charge channel area; and the temperature change in the charge channel, as the proportionality coefficient multiplied by the squares of the charge channel length ratios to the acoustic oscillations half-periods, at that, as the charge ignition process optimal efficiency criterion, one takes the condition of finding the pressure rise beginning in the engine in the time range from reaching the charge flash point temperature in the charge channel during its rising to the charge flash temperature value with the temperature in the charge channel during its decline during the acoustic wave processes action in the engine charge channel.;EFFECT: enabling the charge ignition process optimal efficiency during the engine starting with the bench tests.;1 cl, 2 dwg