In which scenarios are radial burner front cracks typically formed?

Radial burner front cracks are commonly formed during thermal expansion. This phenomenon occurs when the burner front experiences significant temperature changes, causing the materials to expand and contract. When the temperature increases, the metal expands; as it cools down, it contracts. If this expansion and contraction happen rapidly or unevenly, it puts stress on the burner front. Over time, this stress may lead to the formation of cracks that radiate away from the heat source, hence the term "radial."

In a scenario where thermal expansion is a factor, the material's ability to accommodate these changes is crucial. If the materials are not properly designed or if there are pre-existing weaknesses, cracks may develop more readily. Understanding thermal expansion helps in preventing these failures, as proper engineering and materials selection can mitigate the risks associated with stress caused by temperature fluctuations.