Model Aerodynamic Tests with a Wire-driven Parallel Suspension System in Low-speed Wind Tunnel

AbstractOwing to the advantages of wire-driven parallel manipulator, a new wire-driven parallel suspension system for airplane model in low-speed wind tunnel is constructed, and the methods to measure and calculate the aerodynamic parameters of the airplane model are studied. In detail, a static model of the wire-driven parallel suspension is analyzed, a mathematical model for describing the aerodynamic loads exerted on the scale model is constructed and a calculation method for obtaining the aerodynamic parameters of the model by measuring the tension of wires is presented. Moreover, the measurement system for wire tension and its corresponding data acquisition system are designed and built. Thereafter, the wire-driven parallel suspension system is placed in an open return circuit low-speed wind tunnel for wind tunnel tests to acquire data of each wire tension when the airplane model is at different attitudes and different wind speeds. A group of curves about the parameters for aerodynamic load exerted on the airplane model are obtained at different wind speeds after the acquired data are analyzed. The research results validate the feasibility of using a wire-driven parallel manipulator as the suspension system for low-speed wind tunnel tests

An HDG Method for Distributed Control of Convection Diffusion PDEs

We propose a hybridizable discontinuous Galerkin (HDG) method to approximate the solution of a distributed optimal control problem governed by an elliptic convection diffusion PDE. We derive optimal a priori error estimates for the state, adjoint state, their fluxes, and the optimal control. We present 2D and 3D numerical experiments to illustrate our theoretical results.Comment: arXiv admin note: substantial text overlap with arXiv:1712.10106, arXiv:1712.01403, arXiv:1712.0293

Women's labour, kinship, and economic changes in Jinmen in the era of authoritarian rule

This article uses the life stories of three women in Jinmen to demonstrate women’s economic agency in bettering the livelihood of their families in circumstances largely shaped by Cold War geopolitics and the authoritarian state’s military strategies. It argues that women’s devotion of their labour and earnings to their families was part of the reproductive processes of the kinship system, but also important to their building of social reputation and emotional ties with their loved ones. Moreover, the state’s campaign to protect traditional Chinese culture, framed within bipolar politics, supported the ideological reproduction of women’s primary roles being in the domestic sphere. While the lives of Jinmen civilians were significantly distorted in the Cold War era, their experiences of economic improvement and a certain stability in their ways of life – revolving around kinship – account for the ambivalence they now feel towards the period of authoritarian rule

Fatness and wellbeing: bodies and the generation gap in contemporary China

This book chapter is not available in ORA. Citation: Lora-Wainwright, A. (2009) Fatness and wellbeing: bodies and the generation gap in contemporary China. In: Turner, B. S. & Zheng, Y (eds.) The body in Asia. Oxford: Berghahn, pp. 113-128