Design for the Vent Holes of Gas Turbine Flow Guide Disks Based on the Shape Optimization Method

Abstract

Two shape optimization methods, based on non-parametric and geometric parameters, were developed to address stress concentrations in the vent holes of gas turbine flow guide disks. The design optimization focused on reducing the maximum equivalent stress at the hole edge in an aero-engine gas turbine flow guide disk. The effectiveness of both methods in achieving this objective was studied. The results indicated that the non-parametric-based optimization method reduced the maximum equivalent stress at the hole edge by 24.5% compared to the initial design, while the geometric parameter-based optimization method achieved a reduction of 20.2%. Both shape optimization methods proved effective in reducing stress concentrations and improving fatigue life. However, the non-parametric shape optimization method resulted in a better design for the vent holes based on the study’s findings.

PIV Experimental Research and Numerical Simulation of the Pigging Process

“…The fluid velocity is higher where there is liquid deposition and zero where there is no liquid deposition. Since the liquid-phase velocity is directly proportional to the dynamic pressure of the pig, it is recommended to install a guide plate at the front end of the pig during the design process to enhance its working life [27].…”

Fatigue Damage Mechanism and Fatigue Life Prediction of Metallic Materials

“…The effect of component geometric size was considered, and its effect on the fatigue life of the large aviation planetary system was determined. Wen et al [11] determined the shape optimization design of the vent hole structure to achieve enhancing fatigue life. Non-parametric-and geometric parameter-based optimization methods were implemented, and the reduction in the stress concentration was analyzed.…”