大规模生产的汽车和轻型卡车用空气动力性能的测量

[中文适用范围]： “该推荐实践提供了一种测量和记录乘用车全尺寸风洞中空气动力学性能的程序@即@主要面向个人消费者的批量生产的汽车和轻型卡车。预生产和/或的测试或数值建模或缩小比例的模型不在本文件的讨论范围内。空气动力学开发程序@即@改善或优化空气动力学性能的方法@也不包括在内。众所周知，空气动力学性能结果在很大程度上取决于车辆内容和负载@。正如风洞本身（风洞的类型@规模@和模拟质量）。非标准测试结果的发布会导致不必要的额外开发工作以及政府@学术界@和公众对车辆预期空气动力学性能的错误认知。本文件的目的是促进在风洞@中获取的已发布空气动力学性能数据的一致性和可追溯性，从而提高整个车辆开发过程中空气动力学学科的公众声誉和可信度。根据本推荐实践测量空气动力学性能需要根据车辆装载@内容@和风洞条件的规范，对可生产的@全尺寸车辆进行全尺寸风洞测试。特定车辆的测量和生成的文件只能由打算生产该车辆的公司报告。只要有机会解释本文件@，应真诚地努力获得车辆的典型使用性能，并避免在最佳可能的情况下找到最佳可能的性能。使用和遵守本推荐做法是自愿的；然而，对于那些广告或以其他方式发布“根据 SAE J2881 测量”的空气动力学性能的人来说，这是强制性的。相反，任何带有此名称或实质上类似名称的广告或以其他方式发布的结果必须具有由 SAE 接受并根据本建议实践中定义的程序存档的必要文件。附录 B 和 C 包含遵守本建议做法所需的提交文件。当提交材料@时，道路车辆空气动力学委员会主席（或其指定人员）应根据此处的要求审核提交材料是否正确完成@，但不考虑所声称性能的技术优点。主席审核后@SAE 将维护所有提交材料的电子数据库。该数据库仅供道路车辆空气动力学委员会成员使用。任何从数据库检索信息的 RVAC 成员均应了解该信息在其公司内被视为机密。” [外文原描述]： This Recommended Practice provides a procedure for measuring and documenting the aerodynamic performance in a full-scale wind tunnel of passenger vehicles, i.e., mass-produced cars and light-duty trucks intended primarily for individual consumers. Testing or numerical modeling of pre-production and/or reduced-scale models is outside the scope of this document. Aerodynamic development procedures, i.e., methods to improve or optimize aerodynamic performance, are also excluded.It is well-known that aerodynamic performance results depend significantly on vehicle content and loading, as well as the wind tunnel itself (type, scale, and simulation qualities of the wind tunnel). Publication of non-standard test results causes unnecessary additional development work and incorrect perception of a vehicle’s anticipated aerodynamic performance by government, academia, and the general public.The intent of this document is to promote uniformity and traceability of published aerodynamic performance data acquired in a wind tunnel, thereby enhancing the public reputation and credibility of the aerodynamics discipline in the total vehicle development process.Measurement of the aerodynamic performance according to this Recommended Practice requires a full-scale wind tunnel test on a production-ready, full-scale vehicle according to specifications for vehicle loading, content, and wind tunnel conditions.The measurement and resulting documentation for a particular vehicle shall be reported only by the company that intends to produce the vehicle. Whenever there is an opportunity for interpretation of the document, a good faith effort shall be made to obtain the vehicle’s typical in-service performance and avoid finding the best possible performance under the best possible circumstances.Use of and compliance with this Recommended Practice is voluntary; however, it is mandatory for those advertising or otherwise publishing aerodynamic performance as “measured according to SAE J2881.” Conversely, any advertised or otherwise published result carrying this or a substantially similar designation must have the necessary documentation accepted by and on file with the SAE in accordance with the procedures defined in this Recommended Practice.Appendices B and C contain the necessary submittal documents for compliance with this Recommended Practice. When a submittal is made, the chairman of the Road Vehicle Aerodynamics Forum Committee (RVAC) or his/her designee shall review the submittal for proper completion according to the requirements herein, but without consideration of the technical merit of the claimed performance. After the chairman’s review, SAE will maintain an electronic database of all submittals.The database shall be available only to members and liasion members of the RVAC. Any RVAC member who retrieves information from the database shall do so with the understanding that the information is to be considered confidential within his or her company.Cross Reference: 2001-01-0630,2001-01-0633,2003-01-0428,2004-01-0669,2004-01-0670,2005-01-0867,2006-01-0568,2007-01-1050,820377,880250,960671,970136,980394,J1263,J1594,J2084_201604,K2263,SP-1176,SP-1465