The analysis sensitivity of strength, rigid and dynamic characteristics the console rotor to variation design parameters in paper describes speed rotation shaft, material impeller vary. dependences radial axial displacements on angular velocities modulus elasticity are established. For objects type rotary systems with a cantilever arrangement impeller, not one, but set criteria has been introdu...

In this article, turbulent flow heat transfer in the air gap between rotor and stator of a generator under nonhomogeneous heat flux is studied experimentally. The rotor consists of four symmetrical triangular grooves. The stator surface is smooth and does not include any grooves. The relative heat flux between the rotor and the stator is 1 to 3. Temperature and heat flux are measured locally at...

Crack fault of rotor is one of the most prominent problems faced by magnetic bearing rotor system. In order to improve the safety performance of this kind of machinery, it is necessary to research the vibration characteristics of magnetic bearing cracked rotor system. In this paper, the stiffness model of the crack shaft element was established by the strain energy release rate (SERR) theory. T...

Multi rotor UAVs offer great potential wide range of challenging applications due to the high manoeuvrability and to the potential to hover, take off and fly in small areas. Nevertheless, their design is in some way critical. The main concern is their inadequate level of handling qualities due to the intrinsic instabilities of this type of small size vehicles. A specific hardware with a control...

ABSTRACT Vibrationally excited levels of the H2O molecule are currently detected in various environments interstellar medium (ISM), and collisional data for H2O, including vibration with main colliders ISM, needed. The present study focuses on bending relaxation by collision H when taking bending–rotation coupling explicitly into account rigid-bender close-coupling (RB-CC) method. With this aim...

We describe a simple modification to a rigid endoscope so as to provide both high-quality conventional and confocal images of reasonably accessible regions of the body. This versatile system uses a structured illumination approach together with a conventional incoherent illumination source. Images taken in fluorescence are presented using this combined conventional and confocal endoscope.

Weakly convex polyhedra which are star-shaped with respect to one of their vertices are infinitesimally rigid. This is a partial answer to the question whether every decomposable weakly convex polyhedron is infinitesimally rigid. The proof uses a recent result of Izmestiev on the geometry of convex caps.

The effects of lobe tip design parameters on compressor performance were evaluated by utilizing a computer simulation package and taking SRM-D asymmetric type rotor profile as an example. The result suggests that the requirements for high efficiency, large capacity, low inter-rotor contact force and low viscous friction loss do not always lead to the use of the same lobe tip designs. Of all the...