Investigation on flame stability of bluff-body and slitted bluff-body burner in diesel fog combustion

In order to determine the bluff body and slitted bluff body flame stability and combustion performance, atmospheric low-speed experimental platform is used to carry out diesel fog combustion experiment for comparison of two types of bluff body, which are respectively streamlined V-form added straight channel and triangle V-form added straight channel. Results have shown that under the same condition, nonslit triangle bluff body burns better than nonslit streamlined bluff body. In another case, slitted triangular bluff body is still better than the slitted streamlined bluff body in combustion performance if the slit width ratio is selected appropriately (δ/B = 14%). In the case of relatively large slit width ratio (δ/B=29%), the opposite conclusion is obtained, which is that slitted streamlined bluff body is better than the slitted triangular one in combustion performance.