In small-scale combustors. the ratio of area to the combustor volume increases and hence heat loss from the combustor’s wall is significantly enhanced and flame quenching occurs. To solve this problem. non-premixed vortex flow is employed to stabilize flames in a meso-scale combustion chamber to generate small-scale power or thrust for propulsion systems. https://www.alarecre.com/American-Flag-Color-Block-iPhone-14-Waterproof-Case-p12619/