Search

Modern military aircraft systems require substantial increase in thrust capabilities for short durations to meet take-off, steep climbing, quick acceleration, sharp turns and emergent maneuverings requirements. These requirements are most easily met by addition of an afterburner to the basic gas turbine engines. The flow inside the afterburner exceeding the complex and the simulation of such flow is highly challenging. The understanding of such complex phenomena involves a detailed testing involving measurement throughout the afterburner. But it is expensive and time consuming. In this research the attempt has been made to carryout analysis in the afterburner using a CFD computational tool, i.e., ANSYS Fluent. The computations have been executed with the help of SIMPLE scheme based pressure and velocity coupling approach through structured grid arrangement. Due to the presence of high energized fluid particles, the formation of turbulence is quite high thus the standard k-epsilon model has been used for turbulence modeling. Cold flow analysis has been carried out for three different afterburner configurations by varying the locations of the V-Gutter and the result indicates that, for the best configuration the reduction in the total pressure loss and Mach number. [ABSTRACT FROM AUTHOR]

One of the primary selection factors involved in the Unmanned Aerial Vehicles (UAV's) component is high lifetime. Because of the working complexity of rotor, the possibility of fracture occurrence in rotor is quite high. Therefore, to increase the usage of drone, the fracture reduction on drone's propeller is mandatory to execute. In this work also deals the similar kind of process, which means this work can able to provide high reliable material for the construction of propeller based on the structural performance. The flexible and suitable design tool, CATIA is used for the successful construction of conceptual design of a contra – rotating propeller. An advanced numerical methodology, FSI is used for the multi-disciplinary optimization on contra – rotating propeller. Especially the structural parameters such as directional deformation, safety factor, and various relevant stresses are greatly dominating in the phase of multi-disciplinary optimization. Finally, the best material is optimized for contra – rotating propeller for various complicated applications. [ABSTRACT FROM AUTHOR]

In polymer matrix composite, Carbon Fiber Reinforced Polymer (CFRP) based composite has been settled in the top position by means of high load resisting characteristics against all kinds of external forces. Owing to this high CFRP's superiority, the multi perspective optimizations analyses are needs to be carried on the compositional elements of CFRP. This work deals such kind of analysis on various CFRP composites under the flexural load, wherein the advanced Finite Element Analysis is served as the role of Methodology for this computation. As per the ASTM standard, the computational models are constructed in which Epoxy resin is contributed as adhesive element and Carbon Uni-Directional Fibers with a modulus of 230 GPa is served as reinforce element. Under CFRP UD family, two different reinforcements are underwent this complicated flexural tests, which are CFRP UD Prepreg and CFRP UD Wet. The multi-perspective analysis is carried out on fiber and its designing parameters of CFRP, thus purposively UD characteristics based reinforcements are picked for this comprehensive investigation. Forty computational test specimens are prepared and imposed for the aforesaid flexural test and thereafter the suitable fiber orientational angle and best UD fiber are shortlisted based on the reactance of low structural output and high lifetime. Based on these simulation outcomes, the best CFRP composite is shortlisted for various emerging real-time applications such as UAV's Wing and Stabilizers, Automotive Spoilers, etc. [ABSTRACT FROM AUTHOR]