设为首页|加入收藏

• 首 页
• 美军标 MIL
• 国际标准
• 协会标准
• 国内标准
• 论 坛

ASTM C 1136-2002 隔热材料用柔性、低渗透蒸汽阻化剂的标准规范

上一篇: ASTM D 3138-2002 丙烯腈-丁二烯-苯乙烯共聚物管及配件和聚氯乙烯无压管道系统构件之间转换接头用溶剂粘结剂的标准规范
下一篇: ASTM E 2126a-2002 建筑物的框架墙抗剪切力的周期(翻转)负载试验用标准试验方法

标准名称：	测量和控制数字数据通信 工业控制系统用现场总线 类型3：PROFIBUS规范 第5部分：应用层服务定义
英文名称：	Digital data communication for measurement and control - Fieldbus for use in industrial systemsType 3: PROFIBUS specification - Part 5: Application layer service definition
中标分类：	仪器、仪表 >> 工业自动化仪表与控制装置 >> 工业自动化与控制装置综合
ICS分类：	机械制造 >> 工业自动化系统
发布部门：	中华人民共和国国家质量监督检验检疫总局 中国国家标准化管理委员会
发布日期：	2006-10-16
实施日期：	2007-05-01
首发日期：	2006-10-16
作废日期：
主管部门：	中国机械工业联合会
提出单位：	中国机械工业联合会
归口单位：	全国工业过程测量和控制标准化技术委员会
起草单位：	机械工业仪器仪表综合技术经济研究所、中国机电一体化技术应用协会、西南大学、中海石油研究中心等
起草人：	李百煌、欧阳劲松、王春喜、梅恪等
出版社：	中国标准出版社
出版日期：	2007-05-01
页数：	【胶订-大印张】平装大16开 页数：416, 字数：830
计划单号：	20067367-T-604

GB/T 20540的本部分规定了IEC现场总线应用层的结构和服务，这些规定与OSI基本参考模型（GB/T9387）和OSI应用层结构（GB/T17176)一致。

没有内容

没有内容

没有内容

Product Code:SAE ARD50026
Title:A Current Assessment of Planar Waves
Issuing Committee:S-16 Turbine Engine Inlet Flow Distortion Committee
Scope: The subject of planar total pressure waves has been reviewed to determine the feasibility of developing a consensus methodology that can account for the effect of planar waves on inlet/engine compatibility. The review includes a problem assessment, a discussion of possible approaches to methodology definition, a description of testing requirements, conclusions, recommendations, and the results of a document review of planar wave material. The problem assessment showed that planar waves have occurred at propulsion system operating conditions within normal flight envelopes during a number of aircraft development programs. Planar waves generally occur at low mass flow ratio and become more severe with increasing Mach number and decreasing airflow. Other sources, both internal and external, also can generate planar waves. Planar waves usually occur in combination with spatial total pressure distortion. The peak destabilizing event may not correspond to either a peak planar excursion or a peak spatial distortion. Because of the complex nature of the combined disturbance problem and the practice of exercising avoidance procedures, no well-developed consensus method exists for treatment of the combined planar wave/spatial distortion problem. This report defines an approach that is useful in methodology development. A potential approach to methodology definition is discussed which includes the following four key elements: 1) categorization of inlet planar waves, 2) determination of engine response to planar waves, 3) planar wave analysis methods, and 4) combined spatial total-pressure distortion and planar waves, including stability accounting. Elements of methodology validation are discussed in Appendix C. Inlet and compression system component testing will be required to apply the proposed methodology to a specific system. Inlet testing is used to define the planar wave component at the AIP and compression system testing defines the response to planar waves. An assessment of the available data and published information from a document review identified some recent data that define the physical characteristics of planar waves. Several publications describe planar wave test techniques and compression system analytical models. This report recommends that a well-planned analytical and experimental program be conducted to explore the sensitivities of turbine engines to planar waves in combination with various spatial distortion patterns.

© 2009-2024 标准资料网 版权所有，并保留所有权利。

北京智聚科技有限公司 Tel: 010-67123753 E-mail: kefu@infoeach.com

京ICP备14017250号-1