Experimental Setup Tube Seeding

The key to controlling two-phase mixture properties throughout an extended volume is modularity of design. A two-phase mixture can be controlled on a small scale far more readily than on a large scale. In this facility, the mixture is controlled in a number of small modules. Several modules can be combined 

A homogeneous mixture is obtained within each module using an opposed injection configuration. 

A module is fit with two Siemens DI fuel injectors aligned directly opposite one another, as seen in Fig. 1.1. 

The opposed injection configuration provides a number of benefits. There is linear momentum cancellation between the two entrained gas jets, with the stagnation plane at the center of the tube. As a result, small droplets are not thrown against the walls, but are left to disperse throughout the tube. Excessive wall wetting is avoided in this 

This process is completed in a time scale on the order of 100 ms. Homogeneity is therefore achieved before there is significant separation of small and large particles due to settling. With this in mind, detonation is initiated 100 ms after fuel injection. At this time, the system is stationary relative to the time required 

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