INVESTIGATION OF THE HELMHOLTZ RESONATOR CONSIDERED AS A NON-ACOUSTIC OSCILLATING SYSTEM

Abstract

In this paper the validity limits for a pulsating combustion unit have been determined, which has been designed for preheating diesel engines. An interesting phenomenon has been observed, namely the same pulsating frequency could be measured at two different resonator tube lengths. The paper presents an investigation of the basic causes of the frequency deviation of a pulsating combustion system built as a Helmholtz resonator and presents a frequency calculation for real systems. Furthermore, based on detailed investigation, it tries to explain the observed phenomenon.