Research on the Performance of a Passive Gas-Liquid Separator Used in Space

2021 ◽  
Author(s):  
Chengshuo Wu ◽  
Peng Wu ◽  
Bin Huang ◽  
Dazhuan Wu
Keyword(s):  
Flow Rate ◽  
Life Support ◽  
Environmental Control ◽  
High Reliability ◽  
Fluid Distribution ◽  
Gravity Level ◽  
Liquid Separation ◽  
Separation Technology ◽  
Separation Rate ◽  
Liquid Separator

Abstract Gas-liquid separation technology is one of the key technologies of environmental control and life support in manned spaceflight. In order to realize gas-liquid separation under microgravity, a prototype of a gas-liquid separator based on passive static separation technology was designed, manufactured, and studied by both ground experimental tests and computational fluid dynamics (CFD). Results show that the experimental results on earth are in good agreement with the simulation results and the internal fluid distribution directly determines the separation rate of the separator. The separation rate and internal flow field of the separator were also investigated under various flow rate conditions and gravity levels. Results show that higher liquid flow rate and lower gravity level can improve gas-liquid separation rate which attributes to the formation of a complete liquid film at the bottom of the collector. The separation rate can reach 100% within the specific ratio range, and the structure of the equipment is simple, without any power components, meeting the requirements of long life and high reliability of space equipment. It can provide a reference for gas-liquid separation in space under the microgravity environment.

scholarly journals Simulation and Experimental Research on a Gas Liquid Separator with Rotary Impeller

2020 ◽  
Vol 316 ◽  
pp. 03001
Author(s):  
Baihui Wang ◽  
Yingbin Li ◽  
Mingjun Deng ◽  
Baolu Shi ◽  
Wenjin Shang ◽  
...  
Keyword(s):  
Life Support ◽  
Environmental Control ◽  
Simulation Method ◽  
Two Phase ◽  
Design And Optimization ◽  
Manned Spacecraft ◽  
Vof Model ◽  
Wide Range ◽  
Two Parameters ◽  
Liquid Separator

Gas-liquid separation technology under microgravity is the basis for various gas and liquid treatments on a manned spacecraft, which has a wide range of applications in Environmental Control and Life Support System. Dynamic gas-liquid separator is commonly used for the separation of gas-liquid two-phase flow, which has two essential performance parameters called liquid outlet pressure and separating efficiency. Predicting these two parameters accurately under a specific structure has guiding significance for design and application of the dynamic gas-liquid separator. In this study, CFD simulations were conducted using the Volume of Fluid (VOF) model at steady state conditions. In addition, experiments were designed to verify the accuracy of numerical results. Finally, the performance of the separator under microgravity was predicted. It is showed that the simulation method can be utilized to determine the transport performance of dynamic gas-liquid separator, which has significant value in design and optimization.

BIOSATELLITE Environmental Control and Life Support System Design

1967 ◽  
Author(s):  
Robert Ebersole ◽  
Louis Pochettino ◽  
Walter Kugler
Keyword(s):  
System Design ◽  
Support System ◽  
Life Support ◽  
Environmental Control ◽  
Life Support System

scholarly journals Crew Exploration Vehicle Environmental Control and Life Support Development Status

2010 ◽  
Author(s):  
John Lewis ◽  
Richard Barido ◽  
Cynthia Cross ◽  
George Tuan ◽  
Robyn Carrasquillo ◽  
...  
Keyword(s):  
Life Support ◽  
Environmental Control ◽  
Development Status

Development of acoustic mufflers for cabin noise reduction in Orion spacecraft

2021 ◽  
Vol 263 (6) ◽  
pp. 568-576
Author(s):  
Indranil Dandaroy ◽  
S. Reynold Chu ◽  
Jeffrey Dornak ◽  
Christopher S. Allen
Keyword(s):  
Test Performance ◽  
Speech Intelligibility ◽  
Life Support ◽  
Transmission Loss ◽  
Complex Geometry ◽  
Environmental Control ◽  
Acoustic Noise ◽  
Primary Source ◽  
Broadband Noise ◽  
Cabin Noise

Controlling cabin acoustic noise levels in the Crew Module (CM) of the Orion spacecraft is critical for adequate speech intelligibility, avoid fatigue, and prevent any possibility of temporary and permanent hearing loss to the crew. The primary source of cabin noise for the on-orbit phase of the mission is from the Environmental Control and Life Support System (ECLSS) which recycles and conditions breathing air and maintains cabin pressurization through its ducting network and components. Unfortunately, as a side effect, noise from the ECLSS fans propagates through theses ducts and emanate into the cabin habitable volume via the ECLSS inlet and outlets. To mitigate excessive duct-borne noise, two ECLSS mufflers have been designed to provide significant acoustic transmission loss (TL) so that the cabin noise requirements can be met. Each muffler is meant to be installed in the ducting of the ECLSS air inlet and outlet sides, respectively. Packaging constraints and tight volume requirements necessitated the mufflers to be of complex geometry and compatible with the bends of the ECLSS duct layout. To design and characterize the acoustic performance of the inlet and outlet mufflers, computational acoustic models were developed using the Finite Element Method (FEM) with software. Characterization of the acoustic material and perforations in the mufflers were addressed with poro-elastic theory. Once the mufflers were designed on paper and its TL predicted, prototypes of these mufflers were created using additive manufacturing. The muffler prototypes were subsequently tested for acoustic TL in the laboratory with various configurations of acoustic materials. Comparing the analytical predictions to the test performance yielded excellent correlation for acoustic TL and demonstrated significant broadband noise attenuation. The ECLSS mufflers are currently scheduled to be installed on the Artemis II CM of the Orion spacecraft and will provide significant cabin comfort to crew during the mission.

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