Comparative analysis of flow patterns in off-design planar and conical nozzle by San L. Tolentino, Jorge Mírez

“… This study aims to analyze the behavior of Mach number and pressure field flow patterns in off-design planar and conical nozzles with a divergent half-angle of 10.85°. …”
Get full text

Intrinsic transition mechanism to detonation of gaseous laminar flames in tubes by Clavin, Paul

“…The deflagration-to-detonation transition (DDT) on the tip of an elongated flame in a tube is analyzed in the double limit of large activation energy and small Mach number of laminar flames. A spontaneous transition of a self-accelerated laminar flame taking the form of a dynamical saddle-node bifurcation of the flow inside the inner structure of the laminar flame is exhibited by the asymptotic analysis. …”
Get full text

Numerical Investigation of Motive Pressure on Condensation and Evaporation Process in Steam Ejector of Renewable Refrigeration System by Rakibul Islam, Amir Sohel, Md Faisal Bin Ashab

“…As the pressure of motive flow increases, the minimum pressure and minimum temperature in the ejector decreases and the maximum Mach number increases in the ejector, and the production entropy and COP decrease. …”
Get full text

Aerodynamic Performance of Different Trailing-edge Serrations for High Reynolds Number Flows around Wing-flap System by S. Ahmadkhah, A. Jahangirian, A. Zarinvafa

“…The NLR 7301 wing and single-slotted flap is selected as reference geometry and three types of serrations in the form of sinusoidal, square, and triangular shapes are cut into the trailing edge of the main element. The flow at Mach number 0.185 and the Reynolds number 2.51 million is calculated by numerical solution of incompressible Navier-Stokes equations using k-ϵ realizable turbulence model. …”
Get full text

Numerical Study of a Supersonic Nozzle Gas Jet Laden with a Dry Powder Fire-extinguishing Agent Injected from a Bypass Injector by L. Zhang, S. Wu, Y. Feng, H. Guan

“…During the simulation, we employed our newly developed modified drag coefficient model, capable of accommodating a broad spectrum of particle Reynolds and Mach number conditions. Parameter studies show that an increase in the injector position, angle, and total pressure ratio generally causes a decrease in the average particle velocity vp,a, and an increase in the dispersion Ψp and velocity unevenness Φvp; an increase in the total pressure ratio of the main nozzle leads to an increase in Φvp and vp,a. …”
Get full text

An Overview of Solar Orbiter Observations of Interplanetary Shocks in Solar Cycle 25 by Domenico Trotta, Andrew Dimmock, Heli Hietala, Xochitl Blanco-Cano, Timothy S. Horbury, Rami Vainio, Nina Dresing, Immanuel Christopher Jebaraj, Francisco Espinosa Lara, Raúl Gómez-Herrero, Javier Rodriguez-Pacheco, Yulia Kartavykh, David Lario, Jan Gieseler, Miho Janvier, Milan Maksimovic, Nasrin Talebpour Sheshvan, Christopher J. Owen, Emilia K. J. Kilpua, Robert F. Wimmer-Schweingruber

“…The fundamental shock parameters (shock normals, shock normal angles, shock speeds, compression ratios, Mach numbers) have been estimated and studied as a function of heliocentric distance, revealing a rich scenario of configurations. …”
Get full text

A comparative study of turbulence models for predicting the aerodynamic drag of a spin-stabilized projectile by Quang Tuan Nguyen

“…The numerical simulation was carried out at various Mach numbers to study the effect of turbulence models on the projectile aerodynamic drag prediction. …”
Get full text