tip leakage loss introduces major part of losses of the rotor in axial gas turbines. therefore, the rotor blade tip has a considerable effect on rotor efficiency. to understand the flow physics of the rotor tip leakage, we solve the flow field for different tip platforms (passive flow control) and by considering coolant tip injection (active flow control). various blade tip configurations such ...

Tip leakage loss introduces major part of losses of the rotor in axial gas turbines. Therefore, the rotor blade tip has a considerable effect on rotor efficiency. To understand the flow physics of the rotor tip leakage, we solve the flow field for different tip platforms (passive flow control) and by considering coolant tip injection (active flow control). Various blade tip configurations s...

results grip strength and tip and palmer pinch strength in dominant side were statistically greater than them in nondominant side (p < 0.05). there were significant associations between grip strength and height (r = 0.33, p < 0.001), body mass (r = 0.50, p < 0.001), bmi (r = 0.37, p < 0.001), muscle mass of upper extremity (r = 0.56, p < 0.001), fat free mass (r = 0.57, p < 0.001), fat mass (r ...

purpose : to report a patient with retained broken probe tip in the false passage site after nasolacrimal duct (nld) probing case report : a 18-month-baby with epiphora and a nontender mass in the site of lacrimal sac was visited in clinic. she had a history of probing six months ago by another ophthalmologist. the probing was repeated successfully but the mass size didn’t change. the mass was ...

In this article, transverse vibration of a cantilever nano- beam with functionally graded materials and carrying a concentrated mass at the free end is studied. Material properties of FG beam are supposed to vary through thickness direction of the constituents according to power-law distribution (P-FGM). The small scale effect is taken into consideration based on nonlocal elasticity theory of E...

The effect of the tip gap size on the performance of a multistage axial compressor was studied by means of computational fluid dynamics (CFD). It was found that the performance of the compressor was very sensitive to the size of the tip gap. By increasing the gap size, the stall margin value, the total pressure ratio and the compressor efficiency reduced considerably. The flow field at the tip ...

Study Design Retrospective evaluation of consecutively performed fluoroscopically guided cervical nerve root blocks. Objective To describe the incidence of injectate central epidural flow with respect to needle tip position during fluoroscopically guided extraforaminal cervical nerve root blocks (ECNRBs). Methods Between February 19, 2003 and June 11, 2003, 132 consecutive fluoroscopically guid...

The present paper is concerned with the determination of frequency equation and sensitivity eigenfrequencies a fixed-free longitudinally vibrating rod transversally beam carrying tip mass by using several methods. First, exact equations such systems are established, then approximate formulas given for fundamental methods which contain equivalent system, Rayleigh quotient, Dunkerley’s formula co...

Alveolar trills are sounds produced by the self-oscillation of the tongue tip in the alveolar region. Specific aeroacoustic conditions around the lingual constriction are required to produce such sounds, but have not been fully investigated dueto the lack of physical modeling. This study discusses the possibility to model the tongue tip behavior with lumped mass-spring systems similar to those ...