In this study, a Body-Centered Cubic (BCC) lattice structure is integrated into a low-pressure turbine (LPT) high-lift profile (T106C) blade to evaluate the enhancement in the structural dynamics under both Unit and Aerodynamic loading conditions. This is demonstrated numerically and experimentally by cost-effective turbine blade prototyping, using Polylactic Acid (PLA). Five PLA blade models (Solid, Hollow, and three BCC location-based designs) are numerically analyzed for mass and natural frequencies, from which two blades (Hollow and BCC blade with the best location combination) are selected for experimental validation. Furthermore, vibrational response characteristics (displacement, acceleration, and stress) of these selected blades are evaluated at their resonating frequencies and compared. The BCC blade design showed that it is 33.2% lighter than the solid blade while enhancing the natural frequencies by 16.4% and 8.6%. Compared to the Hollow blade, the BCC reduced the acceleration by 9%, displacement by 24%, and overall equivalent (von Mises) stress by a factor of two.
RichardCTKwokTH. Analysis and design of lattice structures for rapid-investment casting. Materials (Basel)2021; 14(17): 4867.
2.
RivaLGinestraPSCerettiE. Mechanical characterization and properties of laser-based powder bed–fused lattice structures: a review. Int J Adv Manuf Technol2021; 113: 649–671.
3.
LiDQinRChenB, et al. Analysis of mechanical properties of lattice structures with stochastic geometric defects in additive manufacturing. Mater Sci Eng A2021; 822: 141666.
4.
KulangaraAJRaoCSPCherianJ. Topology optimization of lattice structure on a brake pedal. Mater Today Proc2021; 47: 5334–5337.
5.
YinSChenHWuY, et al. Introducing composite lattice core sandwich structure as an alternative proposal for engine hood. Compos Struct2018; 201: 131–140.
6.
BhagiLKGuptaPVikasR. A brief review on failure of turbine blades. In: Smart technologies for mechanical engineering, New Delhi, India, 25–26 October 2013, pp. 1–8.
7.
DonovanMHRumpfkeilMPMarksCR, et al. Investigation of elevated turbulence on high-lift low pressure turbine endwall flows. In: AIAA Scitech 2021 Forum, Virtual Event, San Francisco, CA, USA, 11–15 and 19–21 January 2021, Paper no. 0389.
8.
HowellRJRameshONHodsonHP, et al. High lift and aft-loaded profiles for low-pressure turbines. J Turbomach2000; 123: 181–188.
9.
LastiwkaD. Influence of rotor blade scaling on the numerical simulation of a high pressure gas turbine. Masters Thesis, University of Ottawa, Canada, 2009.
10.
Win NaungSNakhchiMERahmatiM. Prediction of flutter effects on transient flow structure and aeroelasticity of low-pressure turbine cascade using direct numerical simulations. Aerosp Sci Technol2021; 119: 107151.
11.
SinghITiwariAC. A revisit to different techniques for gas turbine blade cooling. Mater Today Proc2023. DOI: 10.1016/j.matpr.2023.01.217.
12.
ZhangGZhuRXieG, et al. Optimization of cooling structures in gas turbines: a review. Chin J Aeronaut2022; 35: 18–46.
13.
Efe-OnonemeOIkpeAArravveG. Modal analysis of conventional gas turbine blade materials (Udimet 500 and IN738) for industrial applications. J Eng Technol App Sci2018; 3: 119–133.
14.
KhanSAArifISafdarMU. Determination and comparison of modal parameters of a high lifting low pressure turbine blade under Ni-based superalloys using computational modal analysis. In: 2021 International Bhurban conference on applied sciences and technologies (IBCAST), Islamabad, Pakistan, 12–16 January 2021, pp. 169–176.
15.
MuktinutalapatiN. Materials for gas turbines – an overview. In: BeniniE (ed.) Advances in gas turbine technology. Rijeka: IntechOpen, 2011, pp. 293–314.
OsiewiczMCieślakSBieleckiM. Determination of the geometric properties of a jet engine fan blades based on modal vibration testing. Trans Aerosp Res2022; 2022: 56–74.
18.
PresasAValentínDValeroC, et al. Experimental measurements of the natural frequencies and mode shapes of rotating disk-blades-disk assemblies from the stationary frame. Appl Sci2019; 9(18): 3864.
19.
RaniSAgrawalARastogiV. Vibration analysis for detecting failure mode and crack location in first stage gas turbine blade. J Mech Sci Technol2019; 33: 1–10.
20.
ShetkarKADRSrinivasJ. Analytical modeling and vibration analysis of the last-stage LP steam turbine blade made of functionally graded material. Arab J Sci Eng2021; 46: 7363–7377.
21.
ShuklaAKHarshaSP. Vibration response analysis of last stage LP turbine blades for variable size of crack in root. Proc Technol2016; 23: 232–239.
22.
VerheesMLJ. Experimental modal analysis of a turbine blade. Report, Technische Universiteit, Eindhoven, 2004.
23.
YangYXiangHGaoJ, et al. Experimental study of the vibration phenomenon of compressor rotor blade induced by inlet probe support. J Therm Sci2021; 30: 1674–1683.
24.
MagerramovaLVolkovMGAfoninA, et al. Application of light lattice structure for gas turbine engine fan blades. In: 31st Congress of the international council of aeronautical sciences, Belo Horizonte, Brazil, 9–14 September 2018, pp. 1–10.
25.
AntorkasSMontomoliFMassiniM. Topology optimization of gas turbine blades for additive manufacturing. In: Proceedings of global power and propulsion society, Chania, 7–9 September 2020, Paper no. GPPS-CH-2020-48.
26.
HussainSGhopaWAWSinghSSK, et al. Experimental and numerical vibration analysis of Octet-Truss-Lattice-based gas turbine blades. Metals (Besal)2022; 12: 340.
27.
HussainSGhopaWAWSinghSSK, et al. Vibration-based fatigue analysis of Octet-Truss lattice infill blades for utilization in turbine rotors. Materials (Basel)2022; 15: 4888.
28.
CorbettTMTholeKA. Large eddy simulations of Kagome and body centered cubic lattice cells. Int J Heat Mass Transf2024; 218: 124808.
29.
KimSParkYGYoonSY, et al. Heat transfer enhancement for gas turbine blade internal cooling with lattice structured rib. In: ASME Turbo Expo 2024: Turbomachinery technical conference and exposition 2024, London, UK, 24–28 June 2024.
30.
LiangDHeGChenW, et al. Fluid flow and heat transfer performance for micro-lattice structures fabricated by selective laser melting. Int J Therm Sci2022; 172: 107312.
31.
XuLRuanQShenQ, et al. Optimization design of lattice structures in internal cooling channel with variable aspect ratio of gas turbine blade. Energies (Basel)2021; 14: 3954.
32.
LiuZZhaoRTaoC, et al. Mechanical performance of a node-reinforced body-centered cubic lattice structure: an equal-strength concept design. Aerospace (Basel)2024; 11: 4.
33.
ZhaoMZhangDZLiZ, et al. Design, mechanical properties, and optimization of BCC lattice structures with taper struts. Compos Struct2022; 295: 115830.
34.
ZhangSYangFLiP, et al. A topologically gradient body centered lattice design with enhanced stiffness and energy absorption properties. Eng Struct2022; 263: 114384.
35.
SienkiewiczJPłatekPJiangF, et al. Investigations on the mechanical response of gradient lattice structures manufactured via SLM. Metals (Besal)2020; 10: 213.
36.
Tancogne-DejeanTMohrD. Stiffness and specific energy absorption of additively-manufactured metallic BCC metamaterials composed of tapered beams. Int J Mech Sci2018; 141: 101–116.
37.
SafdarMUXingSSahebyEB. Assessment of similitude behavior in natural frequencies of printed turbine blade. Trans Nanjing Univ Aeronaut Astronaut2024; 41: 488–501.
38.
MouriauxSPuriK. High-lift low pressure turbines T106-A and T106-C. In: HirschCHillewaertKHartmannR, et al. (eds.) TILDA: Towards industrial LES/DNS in aeronautics: paving the way for future accurate CFD - results of the H2020 research project TILDA, funded by the European Union, 2015–2018. Cham: Springer International Publishing, 2021, pp. 465–477.
39.
MichálekJMonaldiMArtsT. Aerodynamic performance of a very high lift low pressure turbine airfoil (T106C) at low Reynolds and high Mach number with effect of free stream turbulence intensity. J Turbomach2012; 134: 061009.
40.
SafdarMUShenXSahebyEB. Impact of internal lattice structures on the weight and natural frequencies of a low pressure turbine blade. Proc Inst Mech Eng G2024; 239: 73–90.
41.
MisraPK. Basic properties of crystals. In: MisraPK (ed.) Physics of condensed matter. Boston: Academic Press, 2012, pp. 1–35.
42.
BhamuRKShuklaASharmaSC, et al. Low-cycle fatigue life prediction of LP steam turbine blade for various blade–rotor fixity conditions. J Fail Anal Prev2021; 21: 2256–2277.
43.
MirkhalafSMFagerströmM. The mechanical behavior of polylactic acid (PLA) films: fabrication, experiments and modelling. Mech Time Depend Mater2021; 25: 119–131.
44.
ShinyamaK. Mechanical and electrical properties of polylactic acid with aliphatic-aromatic polyester. J Eng2018; 2018: 6597183.
45.
FarahSAndersonDGLangerR. Physical and mechanical properties of PLA, and their functions in widespread applications—a comprehensive review. Adv Drug Deliv Rev2016; 107: 367–392.
HillewaertKWiartCArtsT, et al. DNS and LES of transitional flow around a high lift turbine cascade at low Reynolds number, https://www.as.dlr.de/hiocfd/case_c3.7.pdf (2016, accessed August 2024).
48.
SafdarUMasudJKhanO, et al. Effects of modeled stator wake on a low pressure turbine blade dynamic performance. In: AIAA SciTech Forum, 54th AIAA aerospace sciences meeting, San Diego, CA, USA, 4–8 January 2016.
49.
SandersDDO’BrienWFSondergaardR, et al. Predicting separation and transitional flow in turbine blades at low Reynolds numbers—Part I: development of prediction methodology. J Turbomach2010; 133: 031011.
50.
SandersDDO’BrienWFSondergaardR, et al. Predicting separation and transitional flow in turbine blades at low Reynolds numbers—Part II: the application to a highly separated turbine blade cascade geometry. J Turbomach2010; 133: 031012.
