COMPUTING THE CRITICAL VELOCITY OF A TURBINE ON A URAL I COMPUTER (VYPOCET KRITICKYCH OTACEK TURBOSOUSTROJI NA SAMOCINNEM POCITACI URAL I),
Abstract
A method is described for calculating the critical speed of a system of rotors (of a turbo-set) on the URAL I computer. The calculation is based on Prohl's difference method which has been modified for computer application. The method is applicable for a system of a maximum of 10 shafts represented as fields, each field divided into a maximum of twenty sections. The given dynamic problem is defined by a differential equation with four boundary conditions. The rigidity of bearings is considered as a function of the revolution of the shaft, expressed in the form of a third degree polynomial. A program is compiled for the floating point system, using an external magnetic memory. It was later established that the same calculation could have been done five times faster, i.e., in about three hours, by using the fixed point system, and in about one hour by using the URAL II computer. An example illustrating the theory is presented.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 30, 1967
- Accession Number
- AD0839137
Entities
People
- Ladislav Prasek
Organizations
- National Air and Space Intelligence Center