Particle Separation Systems

2005 ◽  
pp. 7-1-7-55
Author(s):  
Hisao Makino ◽  
Hideto Yoshida ◽  
Chikao Kanaoka
Keyword(s):  
Particle Separation ◽  
Separation Systems

Assessment of Scavenge Efficiency for a Helicopter Particle Separation System

2011 ◽  
Author(s):  
Leiyong Jiang ◽  
Michael Benner ◽  
Jeff Bird
Keyword(s):  
Shape Factor ◽  
Flow Characteristics ◽  
Particle Separation ◽  
Operating Conditions ◽  
Separation Mechanism ◽  
Separation System ◽  
Small Particles ◽  
Inlet Velocity ◽  
Separation Systems ◽  
Large Particles

The effectiveness of a typical helicopter particle separation system has been numerically assessed at practical operating conditions and sand environments for various scenarios. The particle separation mechanism and its limitation are revealed by the flow characteristics and particle trajectories in the flow-field. The separation-by-inertia concept is effective for removing large particles, but problematic for small particles of diameter (d) ≤ 36μm. The particle size, shape factor, and rebound characteristics exert substantial effects on particle scavenge efficiency. On the other hand, the effects of gravity, particle inlet velocity, inlet mass distribution, and engine operating conditions on scavenge efficiency are minor or limited for the configurations and operating conditions considered in the present study. In addition, a few suggestions for further investigation on engine particle separation systems are included.

Assessment of Scavenge Efficiency for a Helicopter Particle Separation System

2012 ◽  
Vol 57 (2) ◽  
pp. 41-48 ◽  
Author(s):  
L.Y. Jiang ◽  
M. Benner ◽  
J. Bird
Keyword(s):  
Shape Factor ◽  
Particle Separation ◽  
Operating Conditions ◽  
Separation Mechanism ◽  
Separation System ◽  
Small Particles ◽  
Inlet Velocity ◽  
Separation Systems ◽  
Large Particles ◽  
Flow Field Characteristics

The effectiveness of a helicopter particle separation system has been numerically assessed at practical operating conditions and sand environments for various scenarios. The particle separation mechanism and its limitations are revealed by the predicted flow field characteristics and particle trajectories. The separation-by-inertia concept is effective for removing large particles, but problematic for small particles of diameter ≤36 μm for the configuration and operating conditions considered in the present study. It is also found that particle size, shape factor, and rebound characteristics exert substantial effects on particle scavenge efficiency. However, the effects of gravity, particle inlet velocity, inlet mass distribution, and engine-operating conditions on scavenge efficiency are minor or limited. Finally, a few suggestions for further investigation on engine particle separation systems are included.

scholarly journals Polish experience from the operation of helicopters under harsh conditions

2018 ◽  
Vol 48 (1) ◽  
pp. 263-299 ◽  
Author(s):  
Radosław Przysowa ◽  
Bartosz Gawron ◽  
Artur Kułaszka ◽  
Karol Placha-Hetman
Keyword(s):  
Power Plant ◽  
Particle Separation ◽  
Foreign Missions ◽  
Separation Systems ◽  
Polish Experience ◽  
Efficient Protection ◽  
The Military ◽  
Harsh Conditions ◽  
Dust Ingestion

Abstract The result of operating the military helicopters in a dusty environment is a loss of performance and premature failures of gas paths of the engines. The efficient protection of the power plant against dust ingestion is tough, especially in the desert. The article summarises the experience accumulated while operating the military helicopters under harsh conditions in Poland and during foreign missions. There were characterised the types of conducted missions, operated helicopters, protection methods of engines and common failures. It was stated that the performance of TV3-117 engines and their particle separation systems was insufficient in the mountains and on the desert (Iraq and Afghanistan). The deterioration of gas paths resulted in the loss of helicopters’ performance and substantially contributed to the few aircraft incidents. The experience gained during foreign missions is used in training the crews and ground personnel and in the programmes of modernisation and renewal of the helicopter fleet.

Sign in / Sign up

Export Citation Format

Share Document