喘振介绍
喘振
流体机械及其管道中介质的周期性振荡，是介质受到周期性吸入和排出的激励作用而发生的机械振动。例如，或压缩机运转中可能出现的喘振过程是：流量减小到最小值时出口压力会突然下降，管道内 压力反而高于出口压力，于是被输送介质倒流回机内，直到出口压力升高重新向管道输送介质为止；当管道中的压力恢复到原来的压力时,流量再次减少,管道中介 质又产生倒流，如此周而复始。喘振的产生与流体机械和管道的特性有关，管道系统的容量越大，则喘振越强，频率越低。流体机械产品一般都附有压力-流量特性 曲线,据此可确定喘振点、喘振边界线或喘振区。流体机械的喘振会破坏机器内部介质的流动规律性,产生机械噪声,引起工作部件的强烈振动，加速轴承和密封的损坏。一旦喘振引起管道、机器及其基础共振时，还会造成严重后果。为防止喘振，必须使流体机械在喘振区之外运转。在压缩机中，通常采用最小流量式、流量-转速控制式或流量-压力差控制式防喘振调节系统。当多台机器串联或并联工作时，应有各自的防喘振调节装置。
放喘振旁路示意图
风机的喘振
风机出现周期性的出风与倒流，相对来讲轴流式风机更容易发生喘振，严重的喘振会导致风机叶片疲劳损坏，出现喘振的风机大致现象如下：
1） 电流减小且频繁摆动、出口风压下降摆动。
2 ）风机声音异常噪声大、振动大、机壳温度升高、引送风机喘振动使炉膛负压波动燃烧不稳。
常见的原因：
烟风道积灰堵塞或烟风道挡板开度不足引起系统阻力过大。（我们有碰到过但不多）；两风机并列运行时导叶开度偏差过大使开度小的风机落入喘振区运行（我们常碰到的情况是风机导叶执行机构连杆在升降负荷时脱出，使两风机导叶调节不同步引起大的偏差）；风机长期在低出力下运转。
一般的处理原则是调整负荷、关小高出力风机的导叶开度使风机出力相近，再根据上面所说的可能原因进行查找再作相应处理。
风机、泵或压缩机的喘振详细介绍以及防喘振的具体措施可参考相关文献资料
推荐：《透平式压缩机》黄中岳，王晓放，p236
AspenONE V7.1 介绍
发行年份：2009
版本：7.1
开发者：aspentech
与Visa是否兼容：是
语言：英语
Year: 2009
Version: 7.1
Developer: aspentech
Compatibility with Vista: Yes
Language: English only
Tabletka: Present
Description: Software aspenONE for engineering calculations and modeling are the basis for designing new processes or improving existing processes to improve their performance. Software aspenONE collectively used to construct models and the adoption of business – making the results of simulation
and they provide:
* Consistency of data. AspenONE Software for engineering calculations and simulation help to reduce time to implement the project and make the design process more convenient due to the integration and the possibility of sharing data and knowledge between professionals and managers. Reliable simulation tools provide greater confidence in the correctness of decisions.
* Communication of design, management and business – processes. Due to the open architecture software products aspenONE significantly expands the scope of the models created for the purpose of engineering calculations. These models can also be used to control the factory settings, optimizing in real-time planning and making business – solutions.
* Increase productivity and improve the quality of engineering calculations. With the most complete, powerful and modern means of modeling and optimization, extensive databases, libraries of modular operations, the opportunities of economic analysis, aspenONE software for engineering calculations and simulation can significantly reduce the time to solve engineering problems.
* Improving profitability plants and reduction in the payback of the project. Exact thermodynamic models allow you to design the optimum material, thermal and helper threads, pick up suitable for the process equipment that helps you make better use of capital and increase profits with minimal additional investment.
* Business – Forecasting. Software aspenONE for engineering calculations and simulation can accurately assess the various options for investing in the early stages of project development.
All models of aspenONE software products are based on the knowledge of technological processes, and combines all previous engineering innovations and advances in information technology, and yield reliable results, tested in real industrial plants.
Composition
Aspen Basic Engineering V7.1
Aspen MUSE V7.1
Aspen OnLine V7.1
Aspen PIMS V7.1
Aspen Plus Based Refinery Reactors V7.1
Aspen Process Manual V7.1
Economic Evaluation V7.1
Exchanger Design and Rating V7.1
Operations Support V7.1
Process Development V7.1
Process Modeling (Aspen Plus) V7.1
Process Modeling (HYSYS) V7.1
Size: 3.34 Gb
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Ansys 12.0正式发布-Ansys 12.0开启工程模拟的新时代
SOUTHPOINTE, Pa.–(BUSINESS WIRE)–Apr. 29, 2009– ANSYS, Inc. (NASDAQ: ANSS), a global innovator of simulation software and technologies designed to optimize product development processes, today announced the availability of ANSYS® 12.0, its engineering simulation platform and integrated technology that support Simulation Driven Product Development™. In nearly every industry, driving product development with engineering simulation has become a key strategy to develop more innovative products, to lower development and manufacturing costs, and to accelerate time to market. Forward-looking companies are now embarking on new strategies to gain more from their investment in simulation. Smart Engineering Simulation™ from ANSYS 12.0 enables this progression by dramatically compressing design and analysis cycles, enabling parametric studies and design optimization across multiple physics, increasing the accuracy and completeness of virtual prototypes, and capturing and reusing simulation processes and data.
The most comprehensive engineering simulation solution available, the ANSYS 12.0 software suite supports fast product design and validation in a complete, highly usable virtual environment that captures complex and coupled physical phenomena — providing a high degree of confidence in product designs. ANSYS 12.0 allows engineers to access an unequalled depth and breadth of technology to compress their design processes, and to create innovative products both rapidly and cost effectively — while reducing the time and money invested in physical prototype development and testing.
“In today’s highly competitive markets and challenging economic climate, using virtual prototyping to reduce development costs and time to market is not a choice — it’s a requirement,” said Jim Cashman, president and CEO of ANSYS, Inc. “The pressures of global competition, complex customer requirements and shorter development schedules are forcing engineering organizations to rely on virtual prototyping to ‘get it right the first time’ — and launch products with a higher probability of market success.”
At the foundation of ANSYS 12.0 is the ANSYS® Workbench™ 2.0 platform, a flexible simulation environment that allows engineers to easily set up, visualize and manage simulations. The ANSYS Workbench environment captures and automates repeatable processes, providing dramatic productivity gains and enabling engineers to arrive at better designs faster. Engineers can easily investigate multiple what-if scenarios, optimize their designs across multiple physical phenomena and design for six sigma.
ANSYS 12.0 software offers unequalled technical breadth that allows customers to explore a complete range of dynamic behavior, from frequency response to large overall motion of nonlinear, flexible multibody systems. The suite encompasses a broad solver portfolio that spans a full range of functionality, from structural mechanics to fluid dynamics to thermal analysis to electromagnetics. Not only do the individual capabilities of ANSYS 12.0 represent the best in class, but they are also virtually seamless in their connectivity to one another. This connectivity enables ANSYS 12.0 software to deliver an unmatched multiphysics capability that supports the most accurate and realistic simulations of product performance in the real world — assessing compound physical effects. ANSYS 12.0 technology allows users to set up and manage coupled physics simulations with drag-and-drop ease. Together with its existing, industry-leading coupled physics technology, ANSYS 12.0 establishes a smarter approach to comprehensive multiphysics simulations.
With the introduction of the world-class fluid flow solver ANSYS® FLUENT® into the ANSYS Workbench platform, CFD practitioners can now leverage a parametric and persistent modeling environment and gain access to key enabling technologies such as bi-directional CAD integration, advanced meshing and powerful post-processing.
A highly scalable and customizable solution, ANSYS 12.0 software allows individual customers to implement best-in-class technologies at levels appropriate for their own simulation needs. ANSYS 12.0 can be configured for advanced or professional users, deployed to a single user or enterprise, and executed on laptops or massively parallel computer clusters.
Designed for dynamic CAE collaboration, ANSYS 12.0 allows engineering teams to collaborate more efficiently on product design and development. Within a single project, several engineers can assess their designs within individual disciplines or easily coordinate multiphysics simulations. To manage the workflow of a group of engineers and a myriad of projects, ANSYS® Engineering Knowledge Manager™ (EKM) provides process and data management tools that allow engineers to easily archive, search, retrieve and report their simulation data. With release 12.0, ANSYS Workbench users can now connect directly to an installed ANSYS EKM data repository designed for enterprise or workgroup requirements, or deploy a single-user version of ANSYS EKM from ANSYS Workbench to manage simulation data on a local machine.
“ANSYS has a long history of investment in R&D, coupled with strategic technology acquisitions, to ensure that its engineering simulation capabilities lead the industry — and ANSYS 12.0 represents the fullest expression of that technology leadership,” said Cashman. “As the only simulation technology that brings together all key engineering disciplines in an integrated and flexible platform, ANSYS 12.0 is a full generation ahead of other solutions available today. This platform, which enables Smart Engineering Simulation, will provide a tremendous opportunity for engineers to design higher-quality, more-innovative products that are manufactured faster, and at a lower cost. For business executives and managers, it undoubtedly makes an even more compelling case for engineering simulation as a competitive strategy in the current business environment.”
About ANSYS, Inc.
ANSYS, Inc., founded in 1970, develops and globally markets engineering simulation software and technologies widely used by engineers and designers across a broad spectrum of industries. The Company focuses on the development of open and flexible solutions that enable users to analyze designs directly on the desktop, providing a common platform for fast, efficient and cost-conscious product development, from design concept to final-stage testing and validation. The Company and its global network of channel partners provide sales, support and training for customers. Headquartered in Canonsburg, Pennsylvania, U.S.A., with more than 60 strategic sales locations throughout the world, ANSYS, Inc. and its subsidiaries employ approximately 1,700 people and distribute ANSYS products through a network of channel partners in over 40 countries. Visit www.ansys.com for more information.
ANSYS, ANSYS Workbench, Ansoft, AUTODYN, CFX, FLUENT and any and all ANSYS, Inc. brand, product, service and feature names, logos and slogans are registered trademarks or trademarks of ANSYS, Inc. or its subsidiaries in the United States or other countries. All other brand, product, service and feature names or trademarks are the property of their respective owners.
Source: ANSYS, Inc.
ANSYS, Inc.
Media: Kelly Wall, 724-514-3076
kelly.wall@ansys.com
or
Investors: Annette Arribas, 724-514-1782
annette.arribas@ansys.com
AspenTech 20/4/2009 新闻公告
Leading North American Energy Company Upgrades to aspenONE® V7
AspenTech Helps Customer Integrate Engineering with Operations to
Achieve Operational Excellence Objectives
BURLINGTON, Mass. – April 20, 2009 – Aspen Technology, Inc. (OTC: AZPN.PK), a leading
provider of software and services to the process industries, today announced that EPCO, Inc., has
upgraded to aspenONE V7.
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EPCO, a leading North American provider of midstream energy services to producers and consumers of natural gas, crude oil, natural gas liquids and petrochemicals, is adopting the aspenONE V7 Engineering suite to better align engineering and operations processes in support of its operational excellence objectives.
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EPCO, Inc. chose aspenONE V7 to support the company’s growth strategy, lower operating costs, improve efficiency and productivity, and decrease energy consumption.
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EPCO was drawn to several new innovations in aspenONE V7, including advanced cost estimation, which enables engineers to determine the feasibility of capital projects and business opportunities during conceptual design.
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EPCO will also use the Aspen Simulation Workbook within aspenONE V7, which brings the benefits of aspenONE to a wider range of users throughout the company via a user-friendly Microsoft Excel interface.
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AspenTech’s token-based licensing model helps EPCO better meet their changing business needs by providing the flexibility to use the right software at the right time.
Supporting Quotes:
Kevin Bodenhamer, Vice President of Engineering, EPCO, Inc.
“With our commitment to growing the partnership’s comprehensive network of midstream assets, we are always looking for new ways to manage our increased capacity, new greenfield opportunities, and current debottlenecking challenges. AspenTech’s solutions have played an important role in modeling, optimization, and new projects within our engineering organization for the past few years. We’re excited to implement aspenONE V7 and look forward to utilizing its many new engineering and usability innovations, as well as the unique token-based licensing model. The new system will improve our ability to successfully navigate the turbulent economy by rapidly addressing changing business demands from using the right software at the right time, while optimizing the value of our IT investments.”
Blair Wheeler, Senior Vice President, Marketing, AspenTech
“EPCO is a great example of how leading energy companies are taking advantage of AspenTech process optimization across both engineering and operations. Using aspenONE V7, EPCO can implement engineering best practices to lower their costs, increase productivity, and improve visibility into operations.”
