The Design Optimization including not only performance, but also reliability is strongly required at the conceptual design phase to achieve the space transportation systems with competitive ability, especially for the propulsion systems. The distribution of design margin and risk in whole systems had to be grasped by sensitivity analysis for failure limits. This paper describes the typical failure mode and its causes of liquid rocket engine, and the recent efforts to establish design methodology to realize ...

In this study, in order to propose a calibration method using a correction formula for each steel grade obtained in advance as a calibration method for plate thickness measurement using a permanent UT sensor such as MHI’s Thin-film UT sensor, a temperature-sound velocity correction formula for each steel grade was calculated by obtaining sound velocity values for each temperature from ordinary temperature to 200 degrees centigrade using the Thin-film UT sensor and multiple specimens of steel grade. Using th...
英字タイトル:
Proposal of calibration method for ultrasonic thickness continuous monitoring at high temperature using a thin film UT sensor