Indirect Determination of the Temperature of Induction-Motor Windings Based on Evaluation of Rotor Resistance

AA Pugachev, SV Morozov, AN Marikin… - Russian Electrical …, 2021 - Springer
… insulation occurs in 38.7% of cases and melting of rotors in up to 25%; and, in [3], it was
shown that 75–85% of electric-equipment failures are due to breakdown of insulation during the …

A Device for the Measurement of Rotor Temperature in the Air‐Driven Ultracentrifuge

PG Ecker, J Blum, CW Hiatt - Review of Scientific Instruments, 1949 - pubs.aip.org
… A device is described which permits the measurement of rotor temperature in the air-driven …
situated inside the rotor changes its resistance as the temperature changes. Measurement of …

A test apparatus and facility to identify the rotordynamic coefficients of high-speed hydrostatic bearings

D Childs, K Hale - 1994 - asmedigitalcollection.asme.org
A facility and apparatus are described which determine stiffness… The apparatus has a current
top speed of 29800 rpm with a … The apparatus can independently calculate all rotordynamic …

Calculation and analysis of heat transfer coefficients and temperature fields of air-cooled large hydro-generator rotor excitation windings

L Weili, Z Yu, C Yuhong - IEEE Transactions on Energy …, 2011 - ieeexplore.ieee.org
… In this paper, a new iterative method for calculating the rotor surface heat transfer coefficient
was proposed. The calculated results show a nonlinear distribution on both the windward …

Theory versus experiment for the rotordynamic coefficients of annular gas seals: Part 1—Test facility and apparatus

DW Childs, CE Nelson, C Nicks, J Scharrer, D Elrod… - 1986 - asmedigitalcollection.asme.org
… The apparatus has a current top speed of 8000 cpm with a nominal seal diameter of 15.24
… the test rotor. The apparatus has the capability to independently calculate all rotordynamic …

Radially resolved measurement of stator heat transfer in a rotor–stator disc system

DA Howey, AS Holmes, KR Pullen - International Journal of Heat and Mass …, 2010 - Elsevier
method for measuring stator heat transfer in a rotor–stator disc system using an electrical
heater array. The system is partially blocked at the periphery, with radial outflow of rotor-… rotor

An Apparatus for Determining the Effect of Centrifugal Force on the Potentials of Galvanic Cells

BR Ray, DA MacInnes - Review of Scientific Instruments, 1949 - pubs.aip.org
temperature gradient across the rotor, and it is further desirable that the rotor temperature
should not rise during a determination. … production of appreciable heat through gas friction. The …

Investigations of Air-Cooled Turbine Rotors for Turbojet Engines. 1: Experimental Disk Temperature Distribution in Modified J33 Split-Disk Rotor at Speeds up to 6000 …

WB Schramm, RR Ziemer - 1952 - ntrs.nasa.gov
… The experimental data for several typical disk thermocouples and the cooling-air temperature
at the inlet to the rotor are presented in figures 10, 11, and 12 for 4000, 5000, and 6000 rpm…

Assessment of the efficiency of oxygen absorption in rotor-pulsating apparatus

O Obodovych, V Sydorenko - Acta Periodica Technologica, 2018 - doiserbia.nb.rs
… is a rotor-pulsating apparatus. The purpose of the work was to evaluate the efficiency of the
rotor-pulsating apparatus in … The experimental data were obtained by the method of chemical …

DRYING IN THE APPARATUS WITH A QUICK ROTATING ROTOR

A Adil, O Bobojon, M Abdusama, X Avzabek… - …, 2022 - conferencea.org
… particles is carried out of the apparatus by the drying agent flow, … heat input in such devices
is usually limited due to convective heat transfer, but also due to an underdeveloped heat