Results 71 to 80 of about 2,713 (191)
Life cycle assessment of hydrogen production, storage, and utilization toward sustainability
WIREs Energy and Environment, Volume 13, Issue 3, May/June 2024.The review emphasizes LCA's pivotal role in guiding the hydrogen economy toward a low‐carbon future, positioning hydrogen as a versatile energy carrier with significant potential. Abstract In the pursuit of sustainable energy solutions, hydrogen emerges as a promising candidate for decarbonization.
Ahmed I. Osman +8 more
wiley +1 more source
Engineering Reports, Volume 6, Issue 1, January 2024.We present a proof of concept to demonstrate the capability of a newly invented variable speed push‐pull electromagnetic propulsion system for uninterruptedly generating the reciprocating motion of a magnetic‐piston by a solar battery‐driven polarity changer timing circuit together with a laser‐based timing circuit for redundancy.
Sanal Kumar VR +8 more
wiley +1 more source
Damage and Failure of Aeroengine Blades Under Small UAV Impacts
International Journal of Aerospace Engineering, Volume 2024, Issue 1, 2024.Unmanned aerial vehicles (UAVs) may collide with vulnerable parts of other aircrafts, such as engine blades, causing accidents. The research on small UAV impact is limited. Besides, UAV impact with propeller and rotor blades is poorly understood. In this paper, a finite element (FE) model of a UAV with a weight of 4.78 kg, turbofan blades, propeller ...
Zhibin Wu +4 more
wiley +1 more source
A generalized computer code for developing dynamic gas turbine engine models (DIGTEM) [PDF]
This paper describes DIGTEM (digital turbofan engine model), a computer program that simulates two spool, two stream (turbofan) engines. DIGTEM was developed to support the development of a real time multiprocessor based engine simulator being designed ...
Daniele, C. J.
core +1 more source
Microprocessor-based multichannel flutter monitor using dynamic strain gage signals [PDF]
Two microprocessor-based multichannel monitors for monitoring strain gage signals during aerodynamic instability (flutter) testing in production type turbojet engines were described. One system monitors strain gage signals in the time domain and gives an
Smalley, R. R.
core +1 more source
High-temperature, flexible, thermal barrier seal [PDF]
, 1991 This device seals the sliding interfaces between structural panels that are roughly perpendicular to each other or whose edges are butted against one another. The nonuniformity of the gap between the panels requires significant flexibility along the seal
Sirocky, Paul J., Steinetz, Bruce M.
core +1 more source
Experimental study of ceramic coated tip seals for turbojet engines [PDF]
Ceramic gas-path seals were fabricated and successfully operated over 1000 cycles from flight idle to maximum power in a small turboshaft engine. The seals were fabricated by plasma spraying zirconia over a NiCoCrAlX bond boat on the Haynes 25 substrate.
Biesiadny, T. J. +5 more
core +1 more source
Prediction of axial-flow instabilities in a turbojet engine by use of a multistage compressor simulation on the digital computer [PDF]
A method of estimating the undistorted stall line for an axial-flow compressor by using the digital computer is presented. The method involves linearization of nonlinear dynamic equations about an operating point on a speed line, and then application of ...
Blaha, R. J. +2 more
core +1 more source
MachinesFrom advanced research platforms to Unmanned Aerial Vehicles (UAVs), Micro Turbojet Engines (MTEs) have grown to be essential parts in many different kinds of applications.
Ahmed M. Shehata, Marco P. Schoen
doaj +1 more source
Sonic inlet noise attenuation and performance with a J-85 turbojet engine as a noise source [PDF]
A static test program was conducted to investigate aerodynamic and acoustic performance of a sonic inlet used as a noise suppressor. A translating centerbody type inlet with radial vanes was tested ahead of a J85-GE-13 turbojet engine.
Groth, H. W.
core +1 more source