Optimization Design in Cooling System of Heterogeneous Calibrator for Plastic Profile Extrusion

2010 ◽  
Author(s):  
Li Ren ◽  
Rui Yang ◽  
WenXiao Zhang
Keyword(s):  
Optimization Design ◽  
Cooling System ◽  
Plastic Profile

Temperature-Based Optimization of Film Cooling in Gas Turbine Hot Gas Path Components

2013 ◽  
Author(s):  
Felipe A. C. Viana ◽  
Jack Madelone ◽  
Niranjan Pai ◽  
Genghis Khan ◽  
Sanghum Baik
Keyword(s):  
Film Cooling ◽  
Gas Turbines ◽  
Optimization Design ◽  
Goal Attainment ◽  
High Efficiency ◽  
Cooling System ◽  
Computational Cost ◽  
Metal Temperature ◽  
Cooling Flow ◽  
Hot Gas

To achieve high efficiency, modern gas turbines operate at temperatures that exceed melting points of metal alloys used in turbine hot gas path parts. Parts exposed to hot gas are actively cooled with a portion of the compressor discharge air (e.g., through film cooling) to keep the metal temperature at levels needed to meet durability requirements. However, to preserve efficiency, it is important to optimize the cooling system to use the least amount of cooling flow. In this study, film cooling optimization is achieved by varying cooling hole diameters, hole to hole spacing, and film row placements so that the specified targets for maximum metal temperature are met while preserving (or saving) cooling flow. The computational cost of the high-fidelity physics models, the large number of design variables, the large number and nonlinearity of responses impose severe challenges to numerical optimization. Design of experiments and cheap-to-evaluate approximations (radial basis functions) are used to alleviate the computational burden. Then, the goal attainment method is used for optimizing of film cooling configuration. The results for a turbine blade design show significant improvements in temperature distribution while maintaining/reducing the amount of used cooling flow.

The Simulation Analysis of Tunnel Wind Cooling System in Shenyang Area

2013 ◽  
Vol 724-725 ◽  
pp. 1474-1477
Author(s):  
Xiao Ming Zhang ◽  
Yang Gao ◽  
Xiao Zhang
Keyword(s):  
Optimization Design ◽  
Simulation Analysis ◽  
Cooling System ◽  
System Optimization ◽  
Simulation Software ◽  
Equivalent Diameter ◽  
Tunnel Length ◽  
Surrounding Areas ◽  
Entrance Velocity ◽  
Tunnel Entrance

Applied FLUENT simulation software to research the influence of tunnel length, tunnel entrance velocity, tunnel equivalent diameter and tunnel buried depth four important factors on the tunnel wind cooling system in Shenyang area. The results show that, with the increase of tunnel length and tunnel buried depth and with the decrease of tunnel entrance velocity and tunnel equivalent diameter, the outdoor air which passed into the tunnel cooling amplitude increases. For the tunnel wind cooling system optimization design in Shenyang area and the surrounding areas, the advices are that tunnel buried depth should not be more than 6m and tunnel entrance velocity should not be more than 5m/s.

Optimization Design of Cooling System of Vacuum Calibrator for Plastics Profile Extrusion

2010 ◽  
Vol 168-170 ◽  
pp. 959-962 ◽  
Author(s):  
Qi Bing Wang ◽  
Zhi Ming Wang ◽  
An Hua Peng
Keyword(s):  
Enterprise Resource Planning ◽  
Computer Aided Design ◽  
Optimization Design ◽  
Cooling System ◽  
Target Function ◽  
Resource Planning ◽  
Local Cooling ◽  
Erp System ◽  
Cooling Channels ◽  
Computer Aided

Plastic profile produced by extrusion die should be cooled down and calibrated by calibrator ,so the proper design of the cooling system in calibrator was very important to the profile quality .The cooling channels in calibrator were preliminarily designed according to target function, and peculiar heterotype optimum designs of the local cooling channels were carried out by means of numerical simulation , the cooling effect was improved obviously ,Based on enterprise resource planning ERP system and parallel project computer aided design/computer aided Engineering CAD/CAE intellectualized data-base network, design for the cooling system was more reasonable, and could meet the demands of customers much better.

Monitoring and Material Simulation of Automatic-Cooling System for Waterfowl Incubator

2016 ◽  
Vol 723 ◽  
pp. 268-273
Author(s):  
Huaang Youh Hurng ◽  
Yung Jia Shen
Keyword(s):  
Wind Speed ◽  
Monitoring System ◽  
Optimization Design ◽  
Cooling System ◽  
Carbon Dioxide Concentration ◽  
Simulation Software ◽  
Dynamics Simulation ◽  
Thermal System ◽  
Turbulent Wind ◽  
Control Risk

In order to reduce the required manpower and biosecurity control risk for waterfowl breeding eggs, this study developed waterfowl automatic eggs cooling incubator which using the concept of pre-heating and pre-wetting type front control thermal system and add the automatic watering eggs cooling system, trolley egg rack, pneumatic eggs overturning system and monitoring system. The front control thermal system preheats and pre-wet the air to the required environment for hatching and import into incubator for the hatching test. The test results show that the hatching environment uniformity of automatic eggs cooling incubator developed by this study is better than the traditional incubator’s environment. The monitoring system can stable control the variation for three hatching parameters of temperature, humidity and carbon dioxide concentration. Besides the combination of automatic watering eggs cooling system for hatching process can significantly reduce the required manpower for watering eggs cooling and biosecurity control risk, the average hatching ratio is 82.06% that can satisfy the requirement of general professional goose breeding eggs incubator. The test using computational fluid dynamics simulation software (CFD) to simulate the variable turbulent wind speed. On the premise of using temperature as the respondence to conduct the optimization design of response surface methodology. The results shows that the incubator temperature standard deviation decreased from 0.26°C to 0.14°C when three turbulent wind speed changed from 4.25 m/s, 3.50 m/s and 4.63 m/s to 2 .00m/s, 5 .00m/s and 3.81 m/s. There is a further increase for the uniformity of the temperature field.

Optimization Design of Heterogeneous Mold Based on Genetic Algorithm

2006 ◽  
Vol 532-533 ◽  
pp. 825-828
Author(s):  
Li Ren ◽  
Dong Ming Guo ◽  
Rui Yang ◽  
Zhen Yuan Jia
Keyword(s):  
Genetic Algorithm ◽  
Optimization Design ◽  
Cooling System ◽  
Spline Interpolation ◽  
Solidification Process ◽  
Transient Heat Conduction ◽  
Stress Constraints ◽  
Von Mises Stress ◽  
Material Distribution ◽  
Real Coded Genetic Algorithm

In this paper, regardless of the cooling system of the mold, the optimization design for the material distribution of heterogeneous injection mold is investigated, which is made of two base materials with different thermo-mechanical properties. A mathematical model is constructed in which both a function related to casting average temperature and the temperature gradients throughout all the cavities during the solidification process are taken as the objective function while the von Mises stress constraints of the mold are considered for reducing the stress concentration in the mold. The Finite element method (FEM) and the finite difference method (FDM) are utilized to analyze the transient heat conduction of the mold and casting. The constrained optimal design problem is solved using real coded genetic algorithm. A smooth bicubic B-spline interpolation is proposed for representing the continuous variation of material distribution. The effectiveness of the optimization results is verified by a numerical example.

Coupled Aero-Thermodynamics Optimization for the Cooling System of a Turbine Vane

2013 ◽  
Author(s):  
Zhongran Chi ◽  
Jing Ren ◽  
Hongde Jiang
Keyword(s):  
Temperature Distribution ◽  
System Design ◽  
Optimization Design ◽  
Cooling System ◽  
Critical Issue ◽  
Operating Conditions ◽  
Critical Parameters ◽  
Pin Fin ◽  
Optimization Search ◽  
Generic Algorithms

Cooling system design for the air-cooled turbine is a critical issue in modern gas turbine engineering. Advances in CFD technology and optimization methodology is providing new prospects for turbine cooling system design, that the optimum cooling system of the vanes and blades could be designed automatically by the optimization search coupled with the Conjugate Heat Transfer (CHT) analysis. An optimization platform consists of the Generic Algorithms (GA), a mesh generation tool (Coolmesh), and the CHT solver (ANSYS CFX) is presented in this paper. The optimization study was aimed at finding the optimum cooling structure for the 2nd stage vane of the E3 engine, with acceptable metal temperature distribution and limited coolant amount simultaneously. The vane was installed with impingement and pin-fin cooling structure. The optimization search involved the design of critical parameters of the cooling system, including the size of impingement tube, diameter and distribution of impingement holes, and the size and distribution of pin-fin near trailing edge. The optimization design was carried under two engine operating conditions to explore the affect of different boundary conditions. A constant pressure drop was assumed within the cooling system during each optimization. To make the problem computationally faster, the simulations were approached for the interior only (solid and coolant). A weighed function of temperature distribution and coolant mass flow was used as the objective of the Single Objective Generic Algorithms (SOGA). The result showed that the optimal cooling system configuration with considerable cooling performance could be designed through SOGA optimization without human interference.

Structure Optimization Design about the Wet Grinding Sanding Machine with Double Cooling System

2014 ◽  
Vol 685 ◽  
pp. 208-211
Author(s):  
Shi Yang Wei ◽  
Guang Zhen Cheng ◽  
Zhe Tong ◽  
Jia Hang Ma ◽  
Yan Chun Gu ◽  
...  
Keyword(s):  
Optimization Design ◽  
Material Handling ◽  
Bending Strength ◽  
Cooling System ◽  
Low Cost ◽  
Water Channel ◽  
Cooling Water ◽  
Cylinder Liner ◽  
Wet Grinding ◽  
Working Volume

This paper introduced a wet grinding sanding machine, it is used for fine material. The machine was consists of three parts by stirring grated agencies, cooling system, material handling systems. Rotor and its Rod pin using the whole cast structure, low cost, conical rod pin to improve bending strength. Annular space between the cylinder and the cylinder liner formed cylinder cooling water channel, it connected respectively inlet and return pipes. Hollow spindle, inner pipe, pipe joint and rotor cavity form rotor cooling water channel, dual cooling effect is good. Shell fixed to the cylinder, turn the handle nut, interaction between the thread and the external thread on the piston, forces the pistons to axial movement, used to adjust the working volume and pressure of sanding machine.

Optimization Design in Cooling Channels of Calibrator for Plastic Profile Extrusion Based on Numerical Simulation

2014 ◽  
Vol 494-495 ◽  
pp. 677-680
Author(s):  
Lei Duan ◽  
Yang Zhang
Keyword(s):  
Cross Sections ◽  
Optimization Design ◽  
Heat Transfer Process ◽  
Cooling Efficiency ◽  
Cooling Process ◽  
Element Analysis ◽  
Cooling Channels ◽  
Extrusion Die ◽  
The Finite Element Analysis ◽  
Plastic Profile

Hot plastic profile produced by extrusion die is cooled down and calibrated by calibrator. Therefore, the cooling and calibrating ability of the calibrator directly influence the quality and output of the profile. The key is to design the distribution of cooling channels in calibrator. By analyzing the heat transfer process during cooling in calibrator, the cooling process of plastic profile in calibrator is simulated. Based on the finite element analysis results, the optimization objective is established to obtain the cooling efficiency and uniformity of each node in the profile cross sections of the calibrators exit and finish the optimization design of the cooling channels positions.

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