HEAVY DUTY VEHICLE EXHAUST PLUME STUDY IN THE NASA/LANGLEY WIND TUNNEL

2003 ◽  
Author(s):  
Nigel Clark ◽  
Mridul Gautam ◽  
James Boyce ◽  
Wenwei Xie ◽  
Sandeep Mehta ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Heavy Duty ◽  
Vehicle Exhaust ◽  
Exhaust Plume ◽  
Heavy Duty Vehicle

An Experimental Study on the Characteristics of Nanoparticles Emission from a Vehicle

2012 ◽  
Vol 508 ◽  
pp. 180-183 ◽  
Author(s):  
Zhao Qin Yin ◽  
Jian Zhong Lin ◽  
Li Juan Qian
Keyword(s):  
Experimental Study ◽  
Size Distribution ◽  
Total Concentration ◽  
Number Concentration ◽  
Vehicle Exhaust ◽  
Dispersion Process ◽  
Nucleation Mode ◽  
Exhaust Plume ◽  
Particle Sizer ◽  
Transformation Processes

The Fast Mobility Particle Sizer (FMPS) has been used to measure the particles number concentration and size distribution (6-560nm) of vehicle exhaust plume. The results reveal that vehicle exhaust contribute dominantly to the number concentration in the atmosphere particle. The particles total concentration decreases in the dispersion process. Furthermore, the transformation processes such as nucleation ,coagulation and condensation happen with dispersion process. Because of large number of nucleation mode particles, the coagulation process is in the advantage, which make the particles diameter increase.

scholarly journals Deployment dynamics analysis of CALLISTO’s approach and landing system

2021 ◽  
Author(s):  
Anton Schneider ◽  
Jean Desmariaux ◽  
Josef Klevanski ◽  
Silvio Schröder ◽  
Lars Witte
Keyword(s):  
Space Vehicle ◽  
Transportation Systems ◽  
Dynamics Analysis ◽  
Cooperative Action ◽  
System Parameters ◽  
Exhaust Plume ◽  
Aerodynamic Database ◽  
Deployment Dynamics ◽  
Broad Approach ◽  
Numerical Simulator

AbstractPrior to landing of reusable space transportation systems, the vehicle’s landing legs needs to be fully deployed to enable a safe landing and further re-use of the space vehicle. During that phase the deployment system has to overcome harsh and challenging environmental conditions. In this study, a numerical simulator is developed in order to investigate these influences on the landing leg deployment dynamics. By means of an extensive aerodynamic database and a broad approach flight domain, the influence of aerodynamics, exhaust plume, and vehicle’s attitude on the deployment dynamics is analyzed. This study shows on the example of the first stage demonstrator CALLISTO (Cooperative Action Leading to Launcher Innovation in Stage Toss back Operations), that thrust level, vehicle attitude, and the deployment system parameters affect the deployment performance.

scholarly journals Simulation of the Evolution of Particle Size Distributions in a Vehicle Exhaust Plume with Unconfined Dilution by Ambient Air

2005 ◽  
Vol 55 (4) ◽  
pp. 437-445 ◽  
Author(s):  
Pengzhi Jiang ◽  
David O. Lignell ◽  
Kerry E. Killy ◽  
JoAnn S. Lighty ◽  
Adel F. Sarofim ◽  
...  
Keyword(s):  
Particle Size ◽  
Ambient Air ◽  
Size Distributions ◽  
Vehicle Exhaust ◽  
Particle Size Distributions ◽  
Exhaust Plume

Modification of ionospheric plasma in the near Rf field of a dipole antenna: active experiment in space

2000 ◽  
Vol 6 (5-6) ◽  
pp. 35-48
Author(s):  
N.V. Baranets ◽  
V.V. Afonin ◽  
V.A. Gladyshev ◽  
Y.P. Sobolev ◽  
G.P. Komrakov
Keyword(s):  
Ionospheric Plasma ◽  
Dipole Antenna ◽  
Active Experiment
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