|
|
|
|
|
Jason Cornelius, Sven Schmitz, Jose Palacios, Bernadine Juliano and Richard Heisler
This work details the development and validation of a methodology for high-resolution rotor models used in hybrid Blade Element Momentum Theory Unsteady Reynolds Averaged Navier?Stokes (BEMT-URANS) CFD. The methodology is shown to accurately predict sing...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yucheng Yang, Guohua Xu, Yongjie Shi and Zhiyuan Hu
This study develops a hybrid solver with reversed overset assembly technology (ROAT), a viscous vortex particle method (VVPM), and a CFD program based on the URNS method, in order to study the aerodynamic and acoustic characteristics of coaxial rigid rot...
ver más
|
|
|
|
|
|
|
|
|
|
|
Jungho Lee, Ingyu Lee, Seongphil Woo, Yeoungmin Han and Youngbin Yoon
The spray and combustion characteristics of a gas-centered swirl coaxial (GCSC) injector used in oxidizer-rich staged combustion cycle engines were analyzed. The study focused on varying the recess ratio, presence of gas swirl, and swirl direction to imp...
ver más
|
|
|
|
|
|
|
|
|
|
|
Cundong Xu, Junjiao Tian, Guoxia Wang, Haidong Lian, Rongrong Wang and Xiaomeng Hu
The vortices, backflow, and siltation caused by sediment-laden flow are detrimental to the safe and efficient operation of pumping stations. To explore the effects of water?sediment two-phase flow on the velocity field, vorticity field, and sediment dist...
ver más
|
|
|
|
|
|
|
|
|
|
|
Bohumil Adamec, Juraj Machaj and Peter Brida
In the paper, a novel design of a wideband power splitter for a four-element antenna array using two RF antiphase segments is proposed. Based on a detailed analysis of the power splitter circuit, an analytical model was set up in the MATLAB environment. ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yu-Been Lee and Jae-Sang Park
This present study investigates the effect of blade tip configurations, such as the sweepback angle and anhedral angle, on the performance and hub vibratory loads for the lift-offset coaxial rotor of a 30,000-pound-class high-speed long-range utility hel...
ver más
|
|
|
|
|
|
|
|
|
|
|
Hangwen Zhang, Bochen Li, Boyang Li and Cheng Yang
A numerical method is used to evaluate the influence of propeller parameters on the aerodynamic performance of shrouded coaxial dual rotors in hover. Compared with the open-rotor configuration, the shrouded rotors reduce the tip vortex, resulting in a hi...
ver más
|
|
|
|
|
|
|
|
|
|
|
Junjie Wang, Renliang Chen and Jiaxin Lu
The ducted coaxial propeller (DCP) has great application value in eVTOL aircraft because of its high safety, compactness, and low noise. A numerical simulation method for the DCP is established using the sliding mesh technique. A DCP was designed and man...
ver más
|
|
|
|
|
|
|
|
|
|
|
Dillon O?Reilly, Georg Herdrich, Felix Schäfer, Christoph Montag, Simon P. Worden, Peter Meaney and Darren F. Kavanagh
Pulsed plasma thrusters (PPT) have demonstrated enormous potential since the 1960s. One major shortcoming is their low thrust efficiency, typically <30%. Most of these losses are due to joule heating, while some can be attributed to poor efficiency of th...
ver más
|
|
|
|
|
|
|
|
|
|
|
Nicola Russo, Aniello Daniele Marano, Giuseppe Maurizio Gagliardi, Michele Guida, Tiziano Polito and Francesco Marulo
Multirotors are gaining great importance in the layout of innovative and more agile mobility. In this framework, a possible solution to developing an aircraft complying with the stringent size requirements characterizing this type of application may be a...
ver más
|
|
|
|
|
|