Analysis of heat-driven oscillations of gas flows

摘要: The case treated is that of a straight tube open at both ends and provided with hot wire gauze composed thin spirally wound metallic wire. general form the characteristic equation governing excitation sound when air forced to flow through was derived in previous paper. A discussion now follows transfer functions dissipation acoustic energy tube; it shown first-order solution can be obtained accounts for main features Rijke-tube phenomenon, viz. fundamental frequency occurs only entrance half tube, maximum located about one fifth length from entrance. Neutral curves are calculated which show occur Strouhal number should have value within critical range. This means any given dimensions there corresponds range values mean velocity gas outside no generation. Finally neutral first overtone presented two positions give rise this harmonic.