In this study, the performance analysis of engine was carried out according to parameters determined by parametric cycle in turbofan engines with afterburner and separate exhaust streams. The main purpose study is determine relationship between values, design flight ambient values. For this, effects Mach number, compressor pressure ratio bypass values on specific thrust, fuel-air ratio, fuel co...

Nonlinear control problems in turbofan engines are challenging. No single nonlinear controller can achieve desired effects a full flight envelope, but the case of multiple controllers, there exist bumpless transfer between different controllers. To this end, paper presents mechanism for an uncertain switched system based on integral sliding mode (ISMC), and be used speed engines. The is to desc...

This article presents the development of electric turbofan engine in distributed architecture with a design thrust range 3 to 7.5 and from 30 kN for small medium-sized unmanned aerial vehicles. The subsystems are considered as separate smart modules built-in control system, exchanging data via digital channel central diagnostics unit. key units combined following subsystems: starter turbine gen...

Contributions from the combustor to the overall propulsion noise of civilian transport aircraft are starting to become important due to turbofan design trends and expected advances in mitigation of other noise sources. During on-ground, static-engine acoustic tests, combustor noise is generally sub-dominant to other engine noise sources because of the absence of in-flight effects. Consequently,...

This paper studies the impact of installing noise-suppressing deflector vanes in the bypass flow on the aerodynamic performance of the dual-stream supersonic nozzle of a turbofan engine by using a three-dimensional Reynolds-averaged Navier-Stokes computer program. A series of nozzle configurations using a single pair or double pairs of vanes with NACA0012, NACA4412, and NACA7514 airfoil profile...

Due to energy shortage and global warming, issues of energy saving have become more important. To increase the energy efficiency and reduce the fuel consumption, waste heat recovery is a significant method for energy saving. The organic Rankine cycle (ORC) has great potential to recover the waste heat from the core jet exhaust of a turbofan engine and use it to produce power. Preliminary study ...

A rational function is presented for the acoustic spectra generated by deflection of engine exhaust jets for under-the-wing and over-thewing versions of externally blown flaps. The functional representation is intended to provide a means for compact storage of data and for data analysis. The expressions are based on Fourier transform functions for the Strouhal normalized pressure spectral densi...