Instrument for Measuring Nonstationary Thermal Deformations of Objects in a Gas Flow

摘要

A special device allowing the recording and measurement of deformations in an unstable gas stream is described. The device is based on an optical scheme, with an electric spark illumination of the data units and recording of their shifts on photographic film. The gas flows through the inner part of a double-walled cylinder. The outer wall of the cylinder forms an air jacket for temperature control. The optical system used to detect and record deformations is described. Special attachments used in the system include an OT 24-51 oscillograph, a KR-1 induction coil, an MKU-48 electromagnetic relay, and BPVL wiring 1 mm in diameter. A wiring diagram for the device is shown. The report presents a graph illustrating the time variation of deformation of the cylinder wall and temperatures recorded in the test layer during heating and cooling. (Author)