The functional formula of the flow coefficients for the radial clearance in a rolling piston rotary compressor was developed by the experiments and Computational Fluid Dynamics (CFD) to improve the accuracy of a compressor simulation program. The experiments and CFD simulation were conducted to obtain the flow coefficients at the radial clearance under the assumptions of incompressible flow and...

The detection of casing leakage in oil and gas wells or water injection is an important element wellbore integrity management. Ultrasonic technology suitable to detect identify the position well shafts, providing engineering guidance for subsequent treatment. In this paper, ?nite calculation model established by using computational ?uid dynamics method, large eddy simulation Ffowcs Williams-Haw...

Aiming at the internal leakage problem of spring type nuclear safety valve sealing surface, flow field and sound characteristics height 0.5mm between disc seat surface were studied, numerical simulation was carried out based on large eddy simulation(LES) mohring acoustic analogy method, compare effects wall pressure fluctuation(AWPF) turbulent fluctuation(TWPF) as excitation source external val...

In this paper, we propose new models for directly evaluating DPA leakage from logic information in CMOS circuits. These models are based on the transition probability for each gate, and are naturally applicable to various actual devices for simulating power analysis. We also report the effectiveness of the previously known enhanced DPA on our model. Furthermore, we demonstrate the weakness of p...