创新型涡流发生器在亚音速射流混合增强中的实验研究

Q2 Engineering

INCAS Bulletin Pub Date : 2022-09-09 DOI:10.13111/2066-8201.2022.14.3.11

D. L. V. VASU KANNAH, B. R. Muthusubash, P. SRINITHI PRIYADHARSHINI

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引用次数: 0

摘要

从家用电器到现代高科技火箭，喷射混合在其广泛的应用中变得必要。各种研究人员对射流混合的增强进行了研究，并得出结论，最有效的射流混合是由于喷嘴出口平面处的涡流发生器的接合，从而产生不同尺寸的涡流来增强混合。为了加强射流混合，将两个总堵塞率为3.5%的类似创新涡流发生器放置在收敛喷嘴的径向相对位置。收敛喷嘴的纵横比为1。对马赫数为0.4、0.5、0.6、0.7和0.8的涡流发生器的有效性进行了数值研究。对中心线皮托管压力衰减进行了计算，发现由于引入涡流发生器，堆芯长度减小。为了测量使用涡流发生器的射流混合的有效性，将结果与不受控制的射流进行了比较。

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Experimental Investigation of Innovative Vortex Generators in the Mixing Enhancement of Subsonic Jets

Jet mixing becomes necessary for its wide range of applications from household appliances to modern high technology rockets. Various researchers have studied the enhancement of jet mixing and concluded that the most effective jet mixing is due to the engagement of a vortex generator at the exit plane of the nozzle, thereby creating vortices of different sizes to enhance the mixing. To intensify the jet mixing, two similar innovative vortex generators with a total blockage ratio of 3.5% are placed diametrically opposite locations of the convergent nozzle. The Aspect Ratio of the convergent nozzle is 1. A numerical investigation is carried out to assess the effectiveness of the vortex generator for Mach numbers of 0.4, 0.5, 0.6, 0.7 and 0.8. The centerline Pitot pressure decay was calculated and found to exhibit the core length reduction due to the introduction of the Vortex generator. To measure the effectiveness of the jet mixing using vortex generators, the results are compared with the uncontrolled jet.

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来源期刊

INCAS Bulletin Engineering-Aerospace Engineering

自引率

0.00%

发文量

审稿时长

8 weeks

期刊介绍： INCAS BULLETIN is a scientific quartely journal published by INCAS – National Institute for Aerospace Research “Elie Carafoli” (under the aegis of The Romanian Academy) Its current focus is the aerospace field, covering fluid mechanics, aerodynamics, flight theory, aeroelasticity, structures, applied control, mechatronics, experimental aerodynamics, computational methods. All submitted papers are peer-reviewed. The journal will publish reports and short research original papers of substance. Unique features distinguishing this journal: R & D reports in aerospace sciences in Romania The INCAS BULLETIN of the National Institute for Aerospace Research "Elie Carafoli" includes the following sections: 1) FULL PAPERS. -Strength of materials, elasticity, plasticity, aeroelasticity, static and dynamic analysis of structures, vibrations and impact. -Systems, mechatronics and control in aerospace. -Materials and tribology. -Kinematics and dynamics of mechanisms, friction, lubrication. -Measurement technique. -Aeroacoustics, ventilation, wind motors. -Management in Aerospace Activities. 2) TECHNICAL-SCIENTIFIC NOTES and REPORTS. Includes: case studies, technical-scientific notes and reports on published areas. 3) INCAS NEWS. Promote and emphasise INCAS technical base and achievements. 4) BOOK REVIEWS.