What are pulsations in combustion, and what can cause them?

Pulsations in combustion refer to irregular fluctuations in the pressure or intensity of the flame and can significantly affect the efficiency and safety of a combustion process. One common cause of these pulsations occurs when the flame temporarily detaches from the burner tip and then returns. This phenomenon can create a cycle of instability in the combustion process, leading to fluctuating energy output and possibly impacting equipment performance. Recognizing and addressing the causes of pulsations is essential for maintaining optimal combustion conditions and ensuring consistent operation of stationary engineering systems. Pulsations can additionally lead to increased emissions and even damage to the burner or combustion system if not managed properly. Understanding this mechanism allows engineers to implement appropriate designs and operational strategies to minimize such occurrences.