抄録
The present study explores the explosion risk of nitromethane in fluid hammer phenomena. Nitromethane flowed through the flowpath by the gas-pressurized feed method in this test. The tank pressure conditions are 0.4, 0.6, 0.8 and 0.95 MPaG. No explosion occurred in any case in the present study. The fluid hammer test of water is also conducted to compare with nitromethane. The experimental peak pressure is 5.15 MPaG, and the fluid hammer pressure rise is 4.59 MPaG in the tank pressure condition of 0.95 MPaG. The experimental pressure rise of nitromethane is close to the theoretical prediction given by the Joukowsky equation in the flow velocity condition of more than 3.0 m･s-1 if the pressure propagation velocity is equal to the sonic speed. The peak pressure of the fluid hammer effect for water is the same with or higher than nitromethane. The other experimental fluid hammer test data indicates that nitromethane has similar fluid dynamic behaviors to water. Thus, the present investigation recommends using water for the fluid hammer test of the nitromethane feed system.
