Experiment and numerical simulation on fluid–structure interactions of flexible airships in flying conditions

9th Symposium on Fluid-Structure Interactions, Flow-Sound Interactions, Flow-Induced Vibration & Noise

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Title Experiment and numerical simulation on fluid–structure interactions of flexible airships in flying conditions
 
Creator Jian Zhang; Beijing Electro-mechanical Engineering Institute
 
Subject Fluid–structure interaction; flexible airship; similarity law
 
Description Large deformation will occur and affect the aerodynamics characteristics of a flexible airship remarkably, so fluid–structure interaction is an important issue for fully flexible airships with inflated envelopes. A wind tunnel test is conducted, and a loosely coupled procedure is correspondingly established for numerical simulation based on computational fluid dynamics and nonlinear finite element analysis methods. The typical results of the numerical simulation and wind tunnel experiment, including the overall lift and deformation, are in good agreement with each other. Then, deformation characteristics of a large scale flexible airship are investigated in typical flying conditions. Moreover,the control parameters of airship deformation are attained by the dimensional analysis. The influences of the elasticity modulus, internal pressure, and flow condition are discussed. The deformation will satisfy the geometrical similarity law when the model meets the geometric, material, and dynamic similarity with the test model. A simplified similarity law is also conducted when the thickness of the envelope is unchanged under various scale, which can be used for the model test more easily.
 
Publisher Paper Management System for FIV2018
 
Contributor
 
Date 2018-05-26 03:42:49
 
Type Peer-reviewed Paper
experimental; numerical
 
Format application/pdf
 
Identifier http://www.fiv2018.com/ocs/index.php/fiv2018/fivcan/paper/view/156
 
Source Paper Management System for FIV2018; FIV2018 Conference
 
Language en
 
Rights Authors who submit to this conference agree to the following terms:<br /> <strong>a)</strong> Authors retain copyright over their work, while allowing the conference to place this unpublished work under a <a href="http://creativecommons.org/licenses/by/3.0/">Creative Commons Attribution License</a>, which allows others to freely access, use, and share the work, with an acknowledgement of the work's authorship and its initial presentation at this conference.<br /> <strong>b)</strong> Authors are able to waive the terms of the CC license and enter into separate, additional contractual arrangements for the non-exclusive distribution and subsequent publication of this work (e.g., publish a revised version in a journal, post it to an institutional repository or publish it in a book), with an acknowledgement of its initial presentation at this conference.<br /> <strong>c)</strong> In addition, authors are encouraged to post and share their work online (e.g., in institutional repositories or on their website) at any point before and after the conference.
 

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