Browse > Article
http://dx.doi.org/10.6108/KSPE.2022.26.5.044

A Study on the Structural Stability of Nozzle Manufactured with 5-axis Machining  

Changwook Lee (Firstec)
Yongseok Park (Firstec)
DuckYong Jo (Firstec)
Seong Man Choi (Department of Aerospace Engineering, Jeonbuk National University)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.26, no.5, 2022 , pp. 44-51 More about this Journal
Abstract
In this study, 5-axis machining was proposed as a method for manufacturing a nozzle with a curved shape, and flow analysis and structural analysis were used for structural validation of the manufactured geometry. The program used for CFD obtained the internal temperature and pressure distribution of the nozzle using STAR-CCM+ and used it as the boundary condition for structural analysis. For structural analysis, the commercial program NASTRAN was used, and stress was calculated using the von-mises technique. Based on the maximum stress value generated, the safety margin was 0.78 and the safety margin of the bearing stress was 46.8. In addition, the creep life was calculated as 9.97 x 1012 hours using the Larson-Miller parametric method and applying the maximum stress value of 187 MPa and the exhaust gas perfectly mixed temperature of 463 K.
Keywords
S-shape Nozzle; Five-axis Machining; Structure Analysis;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Rao, G.A. and Mahulikar, S.P., "Intergrated Review of Stealth Technology and Its Role in Airpower," The Aeronaut Journal, Vol. 106, No. 1066, pp. 629-642, 2002.    DOI
2 Lee, H.J., Lee, J.H., Myong, R.S., Kim, S.M. and Choi, S.M., "Computational and Experimental Investigation of Thermal Flow Field of Micro Turbojet Engine with Various Nozzle Configurations," The Korean Society for Aeronautical and Space Sciences, Vol. 46, No. 2, pp. 150-158, 2018. 
3 Lee, C.W., Park, Y.S., Jin, J.Y., Kim, J.W. and Choi, S.M., "A Study on Nozzle Performance Influence with Aft-deck Geometry," TThe Korean Society of Propulsion Engineers, Vol. 25, No. 2, pp. 42-54, 2021. 
4 Joo, M.L., Jo, S.P., Choi, S.M. and Jo, H.N., "An Experimental Study of the Infrared Signal for Exhaust Plume with Bypass Ratio," The Korean Society of Propulsion Engineers, Vol. 23, No. 5, pp. 1-9, 2019. 
5 Choi, S.M., Jang, H.S. and Park, H.H., "Infrared Signal of the Lobed Mixer with External Air Mixing," The Aeronautical Journal, Vol. 125. No. 1291, pp. 1501-1518, 2021.    DOI
6 Lee, C. and Boedicker, C., "Subsonic Diffuser Design and Performance for Advance Fighter Aircraft," Aircraft Design System and Operations Meeting, Colorado Springs, U.S.A., AIAA 1985-3073, Oct. 1985. 
7 Cheng, W., Wang, Z.X., Sun, X.L., Shi, J.W. and Liu, Z.W., "Influences of Shield Ratio on the Infrared Signature of Serpentine Nozzle," Aerospace Science and Technology, Vol. 71, No. 71, pp. 299-311, 2017.    DOI
8 Jin, J.Y., Park, Y.S., Kim, J.W. and Lee, C.W., "Shield Ratio and Thrust Performance Analysis according to the s-type Nozzle of the Centerline Shape," The Korean Society of Propulsion Engineers, Vol. 25, No. 3, pp. 42-55, 2021. 
9 Liou, M.S., "A Sequel to ASUM, Part II: ASUM+-up for All Speeds," Journal of Computational Physics, Vol. 124, No. 1, pp. 137-170, 2006.    DOI
10 Yoon, J.H. and Hwang, K.C., "Creep Life Prediction of SUS 316L Stainless Steel," Transactions of the Korean Society of Automotive Engineers, Vol. 14, No. 2, pp. 16-22, 2006.