Computation of Supercritical Compressor and Turbine Cascades with a Design Method for Transonic Flows

1980 ◽  
Vol 102 (1) ◽  
pp. 68-74 ◽  
Author(s):  
E. Schmidt
Keyword(s):  
Design Method ◽  
Density Ratio ◽  
Full Potential ◽  
Transonic Flows ◽  
Potential Equation ◽  
Contour Shape ◽  
Cascade Arrangement ◽  
Turbine Cascades ◽  
Transonic Region ◽  
Experimental Comparisons

The development of supercritical cascades follows experience with supercritical single profiles. In cascade arrangement strong inter-blade influences exist in the transonic region, so that a desired pressure distribution, starting from the contour shape, is not easy to realize. For these cases, a design method has been developed in which the boundary conditions can be prescribed in a simple and clear manner. Thickness and deflection are not restricted, since the full potential equation is treated. Variation of the axial velocity density ratio is provided for. The solution by relaxation leads to short computing times. Experimental comparisons for turbine and compressor cascades show the applicability of the method.

Fast, Conservative Schemes for the Full Potential Equation Applied to Transonic Flows

AIAA Journal ◽  
1979 ◽  
Vol 17 (2) ◽  
pp. 145-152 ◽  
Author(s):  
Terry L. Holst ◽  
William F. Ballhaus
Keyword(s):  
Full Potential ◽  
Transonic Flows ◽  
Potential Equation ◽  
Conservative Schemes

A Systematic Design Selection Methodology for System-Optimal Compliant Actuation

Robotica ◽  
2018 ◽  
Vol 37 (4) ◽  
pp. 656-674 ◽  
Author(s):  
Abdullah Kamadan ◽  
Gullu Kiziltas ◽  
Volkan Patoglu
Keyword(s):  
Knee Prosthesis ◽  
Design Method ◽  
Real Life ◽  
Direct Consequence ◽  
System Level ◽  
Full Potential ◽  
System Optimal ◽  
Compliant Actuation ◽  
Design Selection ◽  
Selection Methodology

SummaryThis work presents a systematic design selection methodology that utilizes a co-design strategy for system-level optimization of compliantly actuated robots that are known for their advantages over robotic systems driven by rigid actuators. The introduced methodology facilitates a decision-making strategy that is instrumental in making selections among system-optimal robot designs actuated by various degrees of variable or fixed compliance. While the simultaneous co-design method that is utilized throughout guarantees systems performing at their full potential, a homotopy technique is used to maintain integrity via generation of a continuum of robot designs actuated with varying degrees of variable and fixed compliance. Fairness of the selection methodology is ensured via utilization of common underlying (variable) compliant actuation principle and dynamical task requirements throughout the generated system designs. The direct consequence of the developed methodology is that it allows robot designers make informed selections among a variety of systems which are guaranteed to perform at their best. Applicability of the introduced methodology has been validated using a case study for system-optimal design of an active knee prosthesis that is driven by a mechanically adjustable compliance and controllable equilibrium position actuator (MACCEPA) under a periodic/real-life dynamical task.

Prospects of the Unification of Aerodynamics and Aeroacoustics

1995 ◽  
Vol 48 (11S) ◽  
pp. S150-S157
Author(s):  
Mauri´cio Pazini Branda˜o
Keyword(s):  
Full Potential ◽  
Potential Equation ◽  
Recent Trends

This paper reviews recent trends of analysis of aeroacoustic problems via traditional CFD techniques, as well as analysis of aerodynamic problems via modern aeroacoustic methods. Individual methods are described and tendencies of evolution are indicated. A generalized version of the full potential equation is derived. These two complementary forms of research converge towards the integration of Aeroacoustics and Aerodynamics into a single framework, where the computer serves as an integration tool.

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