Reactive lymphocytes are an important type of leukocytes, which morphologically transformed from lymphocytes. The increase in these cells is usually a sign certain virus infections, so their detection plays role the fight against diseases. Manual reactive undoubtedly time-consuming and labor-intensive, requiring high level professional knowledge. Therefore, it highly necessary to conduct research into computer-assisted diagnosis. With development deep learning technology field computer...

The mesh generation of computational domains is a relatively time-consuming step in fluid dynamics (CFD) simulations multi-blade-row compressors. To reduce the time consumption caused by repeated generation, deformation methods have gradually been applied to aerodynamic optimization However, current often difficulty addressing disturbances on rotor/stator interfaces and periodic compressor configurations, which impacts accuracy CFD evaluations optimization. address these challenges, an...

An aerodynamic optimization method for axial flow compressor blades available engineering is developed in this paper. Bezier surface adopted as parameterization to control the suction of blades, which brings following advantages: (A) significantly reducing design variables; (B) easy ensure mechanical strength rotating blades; (C) better physical understanding; (D) achieve smooth surface. The Improved Artificial Bee Colony (IABC) algorithm, increases convergence speed and global ability, find...

The compressor global geometric model including the endwall and blade is parameterized based on a directly manipulated free-form deformation (DFFD) approach. A meridional flow streamline curvature method for solving inverse forward problems applied to reverse design performance analysis of compressor. Combined with an improved Powell search algorithm multi-island genetic algorithm, platform fast aerodynamic optimal multistage axial established. integrated automatic optimization nine-stage in...

The complicated flow conditions and massive design parameters bring two main difficulties to the aerodynamic optimization of axial compressors: expensive evaluations numerous variables. To address these challenges, this paper establishes a novel fast platform for compressors, consisting radial basic function (RBF)-based blade parameterization method, data-driven differential evolution optimizer, computational fluid dynamic (CFD) solver. As versatile interpolation RBF is used as shape...

The intercooling recuperated cycle (ICR) is commonly employed in marine gas turbines to enhance thermal efficiency. However, the addition of an intercooler may lead increased dimension and structural complexity ICR turbines. To address this issue, we propose improved configuration intermediate pressure compressor – axial-centrifugal combined (ACC) with high inlet hub-tip ratio flow rate. aerodynamic performance ACC at multi-operating points optimized via free-form deformation method for...

This paper investigates the effect of rotor-stator spacing and operating conditions on compressor performance interaction mechanism. We focus between rotor wake stator’s flow field through several unsteady numerical simulations aiming at a transonic stage in equal radius path with two-axial three conditions. The simulation results indicate that time-averaged efficiency almost declined by 0.6 points due to mixing loss ranging from close far nominal low load deep upstream leads corner...

Abstract The aerodynamic design and performance improvement of compressors in gas turbine development, especially multistage axial flow with numerous parameters, pose challenges relying on manual experience. To address computational inefficiency optimization turbomachinery, an platform is developed based the Direct Free-Form Deformation (DFFD) method. This method, offering full-geometry three-dimensional parameterization arbitrary degrees freedom, conducts direct manipulation control vertex...

Abstract Compressor design represents a multidisciplinary coupling problem encompassing aerodynamics, structure strength, vibration, fatigue, and acoustics. Multidisciplinary optimization enables comprehensive consideration of the interconnectedness among these disciplines, reasonably balances conflicting requirements, ultimately enhances performance products significantly while reducing development cycle. In this paper, system is established based on data-driven multiobjective evolution...

Abstract The compressor often needs to adjust geometric dimensions in the process of design and testing adapt different use environments save costs. However, low Reynolds number conditions can lead performance degradation small-scale machines. At same time, due limitations processing conditions, relative tip clearance small machines is relatively large, which also affects efficiency stable working range. Therefore, it necessary study impact changes on aerodynamic size scaling. This article...

Point cloud registration, a fundamental task in 3D vision, has achieved remarkable success with learning-based methods outdoor environments. Unsupervised point registration have recently emerged to circumvent the need for costly pose annotations. However, they fail establish reliable optimization objectives unsupervised training, either relying on overly strong geometric assumptions, or suffering from poor-quality pseudo-labels due inadequate integration of low-level and high-level...

Parameterized optimization methods are effective approaches for achieving high aerodynamic performance in compressors. Traditional parameterized rely on a designer's preselected control parameter layout (including frame orientation, point density distribution, displacement direction, number of variables, and variable ranges), which purely based empirical knowledge without sufficient theoretical basis. This paper selects the free-form deformation (FFD) method Bayesian algorithm as...

This paper investigates the clocking effect in subsonic compressor element stages and influence of design parameters on flow mechanism. We focus relationship between wake-induced separation loss wake mixing unsteady mechanism process without considering transition through several steady numerical simulations aimed at a series stages. The simulation results indicate that performance difference various indexing positions depends for different designs operating conditions. Furthermore, pressure...

Multistage axial compressor is the key component of aeroengine and gas turbine to realize energy conversion. In order avoid “curse dimensionality” problem in global optimization process AL-31F four-stage low-pressure under multiple working conditions, an method based on phased parameterization strategy proposed. The uses idea “exploration before exploitation” for reference divides into two phases. first phase, traditional parametric modification stacking line adopted; second full-blade...

This paper presents an approach to determine splitter vane length in radial compressor impellers based on a modified 1D performance prediction model, which considers the effects of and blade number impeller internal losses. The corresponding optimum is investigated achieve maximum efficiency mixed-flow with extremely high hub/tip ratio. An empirical formula for calculating proposed. CFD results show that have complex coupling interaction makes it inappropriate be described by equivalent...

Abstract An improved mean streamline loss model for splittered centrifugal/mixed-flow compressor impellers is presented. One-dimensional predictions, CFD simulations and experimental results Krain impeller are compared to confirm the validity. A new description interaction between blade number splitter length of a mixed-flow with high hub/tip ratio discussed formulized. The optimal principal corresponding maximum efficiency selected by formulas studied. indicate that have reasonable...