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Showing 1 to 8 of 8 for “"counter-rotation"”.
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Axial Compressor Design with Counter-Rotation and Variable RPM for Stall Mitigation
… of incidence angle at the rotor and stator and rotational speed. The paper presents the results of a new axial compressor design with counter rotation and variable RPM. Counter-Rotation is used to push compressor performance during stall by moving the operating point away from surge line with a …
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Clinical and imaging features of the lumbar spine in elite male schoolboy cricketers : the effect of a pre-season lumbar stabilisation intervention
… bowlers who bowl with a high degree of shoulder counter-rotation. There, however, is a lack of evidence in the literature with respect to injury research of all cricketing disciplines, as fast bowlers receive the most attention. After reviewing the literature it was evident that the effect of a …
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Aerodynamic design of an aspirated counter-rotating compressor
… blade aspiration in conjunction with rotor counter-rotation. Aspiration has been shown to make feasible significantly increased blade loading and counter-rotation provides a means of taking full advantage of this potential throughout a multistage compressor. The aspirated counter-rotating …
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Theoretical prediction of counter-rotating propeller noise
… been developed for the tone noise generated by a counter-rotation propeller. We start by deriving formulae for the harmonic components of the far acoustic field generated by the thickness and steady loading noise sources. Excellent agreement is shown between theory and measurements. Asymptotic …
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Design of a multi-spool, high-speed, counter-rotating aspirated compressor
… to the change in swirl across the blade and the rotational velocity of the blades. Counter-rotation provides for the largest change in swirl across a series of rotors, facilitating the largest pressure ratio. A three-stage, counter-rotating, compressor was designed to take advantage of these …
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Design and Numerical Evaluation of a Counter- Rotating Compressor in the Absence of Boundary Layer Control: Part II
<p>Exploration of counter-rotation is a logical step in the development of multistage axial compressors. The promise of substantial reduction in the number of stages and associated collateral benefits cannot be ignored. Despite improved performance, early studies were halted due to issues arising …
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Performance improvement for robotic mechanisms by: synthesis design, dynamic balancing and adaptive control techniques
… Dynamic balance is normally achieved by using counterweight(s), counter-rotation(s) or damping methods. However, the problem is that the whole system will become heavier and have more inertia. It is here proposed that dynamic balancing can be achieved through reconfiguration, rather than using …
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Test particle studies of acceleration and transport in solar and tokamak plasmas
… The effects on impurity ion confinement of both counter-current and co-current rotation are determined. Various majority ion density and temperature profiles, approximating measured profiles in rotating and non-rotating MAST plasmas, are used in the modelling. It is shown that transonic rotation …