基于指标体系的数值风洞软件可信度评价技术研究

Some Investigations on Building a Credibility Evaluation Index System for Numerical Wind Tunnel Software

高精度、高效率和高可信属性是对数值风洞的共性和基础性技术需求。在“国家数值风洞”(NNW)工程支持下,瞄准为验证和确认分系统提供技术支撑,提出重点发展基于指标体系的软件可信度评价技术。基本策略是:针对数值风洞工程研制的常规定常气动力/热软件和非定常类型(含多体分离、动态特性)软件,从软件生命周期不同用户(含软件开发者、评价第三方和工业应用部门)所关心的主要可信度问题出发,研究建立可对软件功能、基本流动模拟能力及工程应用能力进行综合评价的CFD软件可信度指标评价体系,提出具体的评价方法和评价算例,建立验证确认算例库。对基于指标体系的数值风洞软件可信度评价技术的具体实施思路及问题的复杂性进行论述,报道取得的阶段性成果,指出下一步工作重点和方向。

There are many generic and fundamental requirements for numerical wind tunnel that include high precision,high efficiency and high credibility.Under the support of the national numerical wind-tunnel(NNW)project,it is proposed to develop technologies for software credibility evaluation by building an index system towards to support the verification and validation subsystem of the project.The main idea is to build a credibility evaluation system for CFD software in numerical wind tunnel from views of different users including the software developers,the evaluation organizations and the engineering application departments during the life cycle of software,which are suitable for systemic evaluation of the software functions,the simulation capability for base flows,and the simulation capability for engineering problems.The related issues include to propose specific evaluation approaches and test cases,and to establish a database for verification and validation.In this paper the technical framework for building a credibility evaluation index system for numerical wind tunnel is outlined,and the complexities of the problem itself are discussed.Meanwhile,some progresses been made are reported,and future work in next step is emphasized.