DIFFUSER PERFORMANCE IN TWO-PHASE JET PUMPS

Abstract Experimental results are reported from tests on a two-phase variable geometry jet pump with a view to assessing how well the included diffuser handles inlet flows with considerable non-uniformities of both velocity and density. Although the diffuser has an important contribution to make in such an application, results show that its pressure recovering abilities are markedly influenced by increasing non-uniformities at entry and by those potentially developing in the diffuser itself. In two-phase jet pumps, short mixing tubes and thin primary jets should generally be avoided.