Performance evaluation, sensitivity analysis, and mitigating instabilities of Coanda effect-based flow control for a transonic jet: The investigation of shock effects

IF 6 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Ain Shams Engineering Journal Pub Date : 2025-04-05 DOI:10.1016/j.asej.2025.103381

Mohammadreza Soufivand , Mohammad Hojaji , Shadi Ghafouri , Annunziata D’Orazio , Mohammad Amin Siabidzade , Aliakbar Karimipour

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引用次数: 0

Abstract

A flying object can be controlled in various ways. A specific flow control for a transonic jet has been proposed recently based on the Coanda effect and auxiliary flows. The present research uses experimental studies and numerical simulations to discuss and better understand the flow physics of this technique. First, the numerical simulations are validated based on experimental results. Then, a numerical simulation is used to determine various phenomena created in this flow, such as oblique shocks, Mach disks, barrel shocks, deflected shocks, and expansions and compressible fans. The results indicate that the thrust vector deflection is not significantly affected by nozzle sealing in the areas near the Coanda surface and connections with the body. Finally, considering the instabilities of this technique and the sensitivity of its performance to air sealing, a method is mentioned that will eliminate a significant part of its problems while maintaining the advantages of this technique.

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基于Coanda效应的跨声速射流流动控制的性能评估、灵敏度分析和稳定性缓解：激波效应的研究

飞行器可以用各种方法控制。最近提出了一种基于康达效应和辅助流的跨声速射流的特定流动控制方法。本研究通过实验研究和数值模拟来讨论和更好地理解该技术的流动物理。首先，在实验结果的基础上对数值模拟进行了验证。然后，通过数值模拟来确定在这种流动中产生的各种现象，如斜冲击、马赫盘、桶状冲击、偏转冲击、膨胀和可压缩风扇。结果表明，在靠近Coanda表面和与阀体连接的区域，喷嘴密封对推力矢量偏转的影响不显著。最后，考虑到该技术的不稳定性及其性能对空气密封的敏感性，提出了一种方法，该方法将在保持该技术优势的同时消除其大部分问题。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ain Shams Engineering Journal Engineering-General Engineering

CiteScore

10.80

自引率

13.30%

发文量

441

审稿时长

49 weeks

期刊介绍： in Shams Engineering Journal is an international journal devoted to publication of peer reviewed original high-quality research papers and review papers in both traditional topics and those of emerging science and technology. Areas of both theoretical and fundamental interest as well as those concerning industrial applications, emerging instrumental techniques and those which have some practical application to an aspect of human endeavor, such as the preservation of the environment, health, waste disposal are welcome. The overall focus is on original and rigorous scientific research results which have generic significance. Ain Shams Engineering Journal focuses upon aspects of mechanical engineering, electrical engineering, civil engineering, chemical engineering, petroleum engineering, environmental engineering, architectural and urban planning engineering. Papers in which knowledge from other disciplines is integrated with engineering are especially welcome like nanotechnology, material sciences, and computational methods as well as applied basic sciences: engineering mathematics, physics and chemistry.