Aerodynamics of a CRM joined-wing configuration at transonic speeds

Hanman, Paul; Yao, Yufeng; Bouferrouk, Abdessalem

Abstract

The presented work aims to showcase a joined-wing (JW) concept with key design parameters based on the NASA Common Research Model (CRM) configuration, to highlight its potential application for an efficient commercial transport or cargo aircraft flying at transonic speeds. The methodology of converting an existing CRM wing into a JW design is presented. The initial concept design is preceded by a parametric study to determine viable designs with aerodynamic design performed using panel code method VLMD (Vortex Lattice Minimum Drag). These designs are further analysed using CFD (Computational Fluid Dynamics) methods to inspect and show how the flow structures interact within the current JW design and if any unexpected beneficial or adverse effects are experienced. Since the cruise condition for the JW design lies in transonic flow conditions, analysis of shock structure and flow interaction around the joint location is analysed for any localised effects, along with other aerodynamic performances. It is found that a shock appears on the inboard side of the vertical fin, due to high incoming flow speed. This vertical fin also affects a delayed formation of shock on the outboard of main wing near the joint, and this effect reduces gradually towards the main wing tip region.

• Presentation Conference Type: Conference Paper (unpublished)
• Conference Name: 57th 3AF International Conference on Applied Aerodynamics
• Start Date: Mar 29, 2023
• End Date: Mar 31, 2023
• Deposit Date: Apr 7, 2023
• Publicly Available Date: Apr 13, 2023
• Keywords: Aerodynamics; CRM joined-wing; transonic speeds
• Public URL: https://uwe-repository.worktribe.com/output/10611819
• Related Public URLs: https://www.3af-aerodynamics.com/