In this paper, aerodynamic blade design optimization for a transonic axial compressor has demonstrated by using an evolutionary-algorithm-based high-fidelity design optimization tool. The present method uses a three-dimensional Navier-Stokes solver named TRAF3D for aerodynamic analysis to represent flow fields accurately and the realcoded ARGA for efficient and robust design optimization. The p...

Abstract As the next generation of turbomachinery components becomes more sensitive to instrumentation intrusiveness, a reduction number measurement devices required for evaluation performance is possible and cost-effective way mitigate arising non-mastered experimental errors. A hybrid methodology that couples techniques with modeling through Bayesian data-driven framework employed reduce effo...

An implicit procedure based on the artificial compressibility formulation is presented for the numerical solution of the two-dimensional incompressible steady Navier-Stokes equations

Conventional mechanical pumps based on centrifugal or axial turbomachinery are not suitable for micro and nano scales where the Reynolds numbers are usually small. Centrifugal and inertial forces are negligible, and viscous forces dominate the flow field in this length scale (an excellent review can be found on the physics of fluid flow at microscale in [1]). A microfluidic rotary pump, which i...

Numerical simulations of time-periodic flows are an essential design tool for a wide range of engineered systems, including jet engines, wind turbines and flapping wings. Conventional solvers for time-periodic flows are limited in accuracy and efficiency by the low-order Finite Volume and time-marching methods they typically employ. These methods introduce significant numerical dissipation in t...

Ductile fracture and extremely low cycle fatigue (ELCF) [1] are two common failure modes in aircraft engines and turbomachinery designs [2]; however, the linkage between these two failure modes under multi-axial loading conditions has never been systematically studied. Inconel 718 (IN718) is one type of high temperature alloys widely used in turbomachines. Specially designed specimens and tests...

Turbulent swirl flow, which exists in numerous turbomachinery systems, is the focus of this paper. It consumes a significant amount energy, so it subject investigation for many researchers. even more present ventilation as axial fans are still installed without guide vanes. The experimental turbulent flow behind an fan pipe, test rig with free inlet and ducted outlet, defined international stan...

A time-domain harmonic balance method for the analysis of almost-periodic (multi-harmonics) flows is presented. This method relies on Fourier analysis to derive an efficient alternative to classical time marching schemes for such flows. It has recently received significant attention, especially in the turbomachinery field where the flow spectrum is essentially a combination of the blade passing...