Experimental and Numerical Analysis of Flow Behavior for Reverse Circulation Drill Bit with Inserted Swirl Vanes

<div>Variations in air velocity at different cross-sections along central passage of drill bit without flushing nozzles: (a) maximum tangential velocity; (b) average tangential velocity.</div>

Geofluids

fig9

Figure 9

Figure 9: Experimental and Numerical Analysis of Flow Behavior for Reverse Circulation Drill Bit with Inserted Swirl Vanes 