Ultrasonic Drying System Boundary Layer Disruption

The patent replaces the mechanical combustion system with an ultrasonic vibration system. The ultrasonic transducer generates high-frequency vibrations that create acoustic waves to disrupt the boundary layer, achieving enhanced heat transfer without the large-scale mechanical combustion equipment. This substitution of mechanical/chemical means with acoustic vibration resolves the contradiction between high productivity and compact size.

The patent applies mechanical vibration through ultrasonic transducers that generate high-frequency acoustic oscillations (typically 20-100 kHz). These vibrations directly disrupt the boundary layer around the material surface, enhancing heat and mass transfer rates. The vibration-based approach achieves the desired heat transfer improvement in a compact form factor, avoiding the large equipment required by pulse combustion methods.

The patent replaces the energy-intensive combustion system with an electrical ultrasonic system. Instead of burning fuel to generate pulsating hot air jets, the system uses electrical power to drive ultrasonic transducers that generate acoustic waves. This substitution eliminates the need for natural gas lines and combustion infrastructure, reducing both capital costs and ongoing energy expenses while maintaining effective heat transfer enhancement.

The patent changes the fundamental operating parameters from high-temperature combustion to high-frequency acoustic vibration. By operating in the ultrasonic frequency range (20-100 kHz) rather than relying on thermal combustion, the system achieves boundary layer disruption through mechanical vibration energy instead of thermal energy. This parameter change enables cost-effective operation without combustion gases and associated infrastructure requirements.

The patent applies high-frequency mechanical vibration through ultrasonic transducers to directly disrupt the boundary layer. The ultrasonic vibrations (20-100 kHz) create acoustic waves that intensively agitate the boundary layer, achieving far more effective disruption than conventional convective heating. This vibration-based approach reliably breaks down the boundary layer resistance, enabling significantly higher heat transfer rates compared to standard convective methods.

The patent employs periodic ultrasonic vibrations at high frequencies (20-100 kHz) to continuously disrupt the boundary layer. The periodic acoustic waves create repeated cycles of compression and rarefaction that prevent boundary layer stabilization, ensuring consistent and reliable heat transfer enhancement. This periodic action at ultrasonic frequencies provides more effective and reliable boundary layer disruption than steady-state convective heating.