Research on the coupled design method for the aerodynamic configuration of a mixed flow exhaust system with a confluent mixer

Abstract

A confluent mixer-nozzle-shaped central plug coupled design method by using the B-spline, CFD method and revised particle swarm optimization is proposed in this paper. Then, this method is used to redesign a mixed flow exhaust system with a confluent mixer, and the performance of the redesigned model is compared with the exhaust system designed by the separated method. According to the comparison results, the redesigned exhaust system has a better mass flux distribution than the original system. The difference in bypass ratio between the redesigned model and theoretical design is 2.8%. With respect to aerodynamic performance, the thrust of the redesigned exhaust system is 6.1% higher than that of the original system under the design condition, and its total pressure recovery coefficient increases to 0.995 from 0.987 of the original model. At off-design conditions, the thrust and total pressure recovery coefficient of the redesigned model increase by 4.3% and 0.6%, respectively, compared with the original model.

Wind-Induced Vibrations and Gust Response Factors of the Cabin–Cable–Tower System

“…Notably, it is crucial to appropriately distribute the densities of the structural elements to ensure that the simulation accurately represents real-world conditions. Although the modeling of the feed cabin solely considers its main framework structure and does not account for the skin structure on its surface, the aerodynamic characteristics of the feed cabin are considered, which can be retrieved from the previous study [18]. To ensure the accuracy of the response analysis of the supporting tower, the main members are divided into 10 elements and the secondary members are divided into 5 elements.…”