The reciprocating-airfoil (RA) driven vertical take-off and landing (VTOL) aircraft is a new concept that utilizes the reciprocating motion of wings to provide lift for landing. RA are shaped like fixed-wing airplane work as fixed while cruising. wing undergoes substantial linear during may generate similar aircraft. unique structural characteristics their high inertia lifting force loadings. T...

The present work considers the development of a computational model to simulate the dynamics of reed type valves of reciprocating compressors. Because the valve dynamics and the time dependent flow field through the valve are coupled, they are solved simultaneously. A one-degree of freedom model is adopted for the valve motion and the finite volume methodology is employed to obtain the flow fie...

We consider a system of two coupled particles fluctuating between two states, with different interparticle interaction potentials and particle friction coefficients. An external action drives the interstate transitions that induces reciprocating motion along the internal coordinate x (the interparticle distance). The system moves unidirectionally due to rectification of the internal motion by a...

During the electrophysiologic study of 435 patients referred for evaluation of Wolff-Parkinson-White syndrome, 42 (10%) had preexcited reciprocating tachycardia (defined as a macro-reentrant tachycardia that used an accessory atrioventricular [AV] pathway for antegrade conduction). The ages of the patients ranged from 9 to 67 years (27 +/- 14). Thirty-three were male patients, nine female, and ...

Analysis of reciprocating equipment piston rod leads to nonlinear elastic-plastic deformation analysis of rod with initial imperfection under axial dynamic load. In this paper a new and effective model and analytical formulations are presented to evaluate dynamic deformation and elastic-plastic stresses of reciprocating machine piston rod. This new method has capability to account for geometric...

OBJECTIVE To evaluate the outcomes of arthrocentesis with the new highly controllable, one handed reciprocating procedure syringe compared with a conventional syringe. METHODS 100 arthrocentesis procedures were randomised between the reciprocating syringe and the conventional syringe. Outcome measures included patient pain, procedure duration, operator satisfaction, synovial fluid volume, cel...

The major problems encountered in a reciprocating compressor are because of the valve failure .The other problem of leakage past the piston because of the worn out piston rings has also been placed in the reciprocating compressor. Pressure pulsations generated inside the piping of a reciprocating compressor may be taken as one of the tool for diagnosing the nature of fault inside the compressor...