Discharge coefficient and jet deflection studies for combustor liner air-entry holes

In the simple tubular combustor system for turbojets and ramjets, figure 1, at the primary zone it is required to achieve a high heat release and stable flame. At the dilution cone to have a good air flow distribution (Ref. I ), and adequate penetration. In both zones these requirements needs to be with the minimum total pressure loss for high overall efficiency, short liner length, and light simple construction (Ref. 2 ). The air flow distribution between these two zones is still the main problem of the design engineer. But the flow of annular air to these zones is governed by the geometry of the eyetem, hole coonetry and dicehargo coefficient of these holes. For light construction and adequate penetration, the main governing factor is the deflection angle of the liner jots. Cont/d.