What is the disadvantage for can annular type combustion chamber?

The primary disadvantage of an annular type combustion chamber is its complexity and cost of manufacturing, as it requires precise engineering to ensure uniform fuel and air mixing across the entire annular space. This design can also lead to challenges in cooling and thermal management, as the heat distribution may be uneven. Additionally, any failure in one section of the chamber can compromise the entire system, making maintenance and repairs more difficult compared to simpler designs.