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The flow through the throat-type energy-dissi-pators is calculated by using an axis-symmetrical K-ε turbu-lence model. The velocity field, the pressure field and the dis-tributions of turbulent energy and its dissipation rate are ac-quired. The energy dissipation through the throat-type ener-gy-dissipators can be seen in detail. The calculated pressuredistribution is compared with the measured and in good agree-ment. The results are useful to understand deeply the flowcharacteristics of the throat-type energy-dissipators.