Shape adaptive aerofoils for turbomachinery

An easy three-step TurboTides Design Wizard helps even a new user arrive at a good starting design using TurboTides' built-in design rules for different turbomachine classes and applications.

Division of Aerospace Engineering and Fluid Mechanics

This wing demonstrates that sufficient control of the rolling motion of aircraft and maximization of the lift-to-drag ratio can be achieved through active wing twist.

For example, offset distribution determination unit 34 can be configured to use a weighted nonlinear least squares minimization to define the compromise offset distribution.

Selective Compliance Aerofoils with Variable Stiffness Multi-stable Elements for Morphing Applications A concurrent design and optimisation methodology was developed, aimed at a shape-adaptable solution addressing the conflicting requirements of morphing through the concept of stiffness variability.

The third important property of a Bezier curve is its convex hull property, which means that these curves are completely situated inside their own convex hull, constructed by the polygons. Some important parameters to describe an airfoil's shape are its camber and its thickness.

For both upper and lower surfaces, the airfoil with chord of 1 can be stated as: In an alternative embodiment, system controller 20 and adaptive machining controller 30 can include a single controller. The theory idealizes the flow around an airfoil as two-dimensional flow around a thin airfoil.

Indeed, their affine invariance and local control property make them appropriate for such geometry handling. The data storage structures can include, for example, equations, arrays, matrices, tables, etc.

Different definitions of airfoil thickness An airfoil designed for winglets PSU WL The shape of the airfoil is defined using the following geometrical parameters: On the other hand, a vast variety of population-based optimization techniques have been formulated in recent decades, some of which are inspired by natural processes taking place in our environment.

This contribution gives a broad insight into the conceptual and historical back-ground of the adaptive airfoil issue and provides an overview on the actual stand of research on this topic. A stable interface element scheme for the p-adaptive lifting collocation penalty formulation.

In some examples, adaptive machining system 10 can be configured to remove the material, for example about 0. Computational fluid dynamic analysis is used to investigate the design point and off-design performance of the original and modified airfoils, and compare with experiments on the original ones.

Another 16 parameters are also determined by enforcing -continuity at the intersections of the segments. In the region of the ailerons and near a wingtip a symmetric airfoil can be used to increase the range of angles of attack to avoid spin — stall.

Thermal contraction of the artificial muscles Fig. However, these designs suffer some performance, scalability and cost problems due to the restrictions of the artificial muscles. Swept, unswept and rotated grids may be used to develop local computational domains which may be overlapped with either the surface or other multigrid levels.

In terms of application, the final appropriate parametric representation of geometries is an essential, significant component of aerodynamic profile optimization processes as well as reverse engineering purposes.

Surrogate Modelling

That is the reference dimension of the airfoil section. Not like the span twist around a rod that results in different angle-of-attack of the airfoil profiles along the wing span in other studies, this wing is capable of achieving roll control and gust load alleviation to optimize cruise and maneuver conditions by different thickness distribution and trailing edge morphing.

On the other hand, 2 shows that the degree of the Bezier curve is determined by the number of CPs.

Mathematical Problems in Engineering

Then, the well-organized optimization techniques for optimum curve fitting used in this research are explained in Section 4. The program satisfies the nonlinear boundary condition on the free water surface.

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Aerospace Sciences Meeting, number To achieve this purpose, after indicating the digitized points of the airfoil profile and choosing the approach for airfoil shape modeling, four curves will separately be fitted to any airfoil shape.

Claims 17 What is claimed is: However, development in the field of artificial muscle may provide some visionary solutions to this problem []. Evolutionary Optimization Technique As mentioned earlier, two evolutionary optimization methods customized and specialized by the authors are used to optimally fit the parametric curves to the airfoil point cloud.

Consisted of a compliant base plate and seamless and continuous compliant skin with the artificial muscles embedded in, this trailing edge morphing mechanism is extremely light in weight and efficient in reconfiguration of the wing sectional profile. In some examples, NC machine 16 can include a numerically controlled milling machine that mills the airfoil spar surface.

Implicit multigrid schemes for challeng- ing aerodynamic simulations on block-structured grid. In the example illustrated in FIG.

It consists of a collection of menu-driven routines which perform functions such as; viscous or inviscid analysis of an existing airfoil, airfoil design and redesign by interactive specification of a surface speed distribution, airfoil redesign by interactive specification of new geometric parameters.

After that, designing an experiment is done for each algorithm to finally illustrate the effectiveness of the proposed algorithms. Then, iterations will be continued until the best global position is reached. Power consumption, noise emission and overall aircraft environmental impact can be significantly reduced with enhanced flight performance by morphing technologies.

A TURBOMACHINERY DESIGN TOOL FOR TEACHING DESIGN CONCEPTS FOR AXIAL-FLOW FANS, COMPRESSORS, AND TURBINES Mark G. Turner University of Cincinnati [email protected] Ali Merchant MIT [email protected] Dario Bruna University of Genoa, Italy [email protected] ABSTRACT A new turbomachinery design system, T-AXI, is described and demonstrated.

Computational Investigation and Design Study of Adaptive Axial-Flow Turbomachinery Rotor Blade Muthuvel Murugan, Anindya Ghoshal, Luis Bravo, Fei Xu, Ming-Chen Hsu, Yuri Bazilevs, Kevin Kerner May 8, Your Path: Home > Computational Investigation and Design Study of Adaptive Axial-Flow Turbomachinery Rotor Blade.

In either case, the added material must be contoured to bring the airfoil surface back to its original shape.

US9817393B2 - Adaptive machining of components - Google Patents

Using adaptive machining, operations such as chord restoration, leading-edge profiling, airfoil surface machining and blending back into the original material can be performed automatically.

In this study, an innovative adaptive variable camber compliant wing, with skin that can change thickness and tailing edge morphing mechanism that is designed.

Validating the 7FA

An adaptive method for airfoil shape parameterization is also applied and its impact on the optimum design and convergence of the optimization process isinvestigated. In order to demonstrate the efficiency of the proposed method, a geometric inverse design using Genetic Algorithm is carried out and the capability of the method for producing.

used to describe airfoil shapes in CFD applications. Given an arbitrary airfoil shape, how well a method can approach the shape depends on the completeness of the set of all the shapes the method can describe.

In an aerodynamic optimization problem the optimum design is an unknown shape.

Shape adaptive aerofoils for turbomachinery
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Preliminary airfoil design of an innovative adaptive variable camber compliant wing | JVE Journals