International Space Station Node 3 CFD Ventilation Modeling for Early Ingress and Nominal Operation

Son, Chang H.; Ivanov, Nikolay; Смирнов, Е. М.; Telnov, Denis S.

doi:10.2514/6.2010-6170

Cited by 2 publications

(3 citation statements)

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“…1 ISS ECLSS Analysis Lead, 13100 Space Center Blvd, e-mail: сhang.h.son@boeing.com. 2 Associate professor, Polytechnicheskaya, 29, e-mail: ngivanov@mail.ru. 3 Professor, Polytechnicheskaya, 29, e-mail: aero@phmf.spbstu.ru.…”

Section: Introductionmentioning

confidence: 99%

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CFD Modeling of Water Droplet Transport for ISS Hygiene Activity Application

Son

Ivanov

Смирнов

et al. 2013

43rd International Conference on Environmental Systems

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The goal of this study is to assess the impacts of free water propagation in the Waste and Hygiene Compartment (WHC) installed in Node 3. Free water can be generated inside the WHC in small quantities due to crew hygiene activity. To mitigate potential impact of free water in Node 3 cabin the WHC doorway is enclosed by a waterproof bump-out, Kabin, with openings at the top and bottom. At the overhead side of the rack, there is a screen that prevents large drops of water from exiting. However, as the avionics fan in the WHC causes airflow toward the deck side of the rack, small quantities of free water may exit at the bottom of the Kabin. A Computational Fluid Dynamics (CFD) analysis of Node 3 cabin airflow enabled identifying the paths of water transport. To simulate the droplet transport the Lagrangian discrete phase approach was used. Various initial droplet distributions were considered in the study. The droplet diameter was varied in the range of 5-20 mm. The results of the computations showed that most of the drops fall to the rack surface not far from the WHC curtain.

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Section: Introductionmentioning

confidence: 99%

“…Assessment of the overall ventilation characteristics of the Node 3 cabin and WHC interior was performed earlier. 1,2 The crew hygiene activities in the WHC could lead to free water propagation due to hand movement of crew cleaning their head and body. The WHC doorway is enclosed by a waterproof curtain with openings at the top and bottom.…”

Section: Introductionmentioning

confidence: 99%

CFD Modeling of Water Droplet Transport for ISS Hygiene Activity Application

Son

Ivanov

Смирнов

et al. 2013

43rd International Conference on Environmental Systems

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“…There are many applications in fluid mechanics requiring the measurement of low velocities; it is the case with the air velocity inside homes, offices [1,2], operating and clean rooms [3,4], laboratories, biological safety cabinets [5][6][7], vehicles [8], aircraft cabins [9,10], space stations [11,12] as well as in the confined space inside electronic equipment and robotic applications [13,14]. The measurement of low flow velocities proves to be important in the field of the thermal convection phenomena.…”

Section: Introductionmentioning

confidence: 99%

Thermistor based, low velocity isothermal, air flow sensor

Cabrita

Mendes

Quintela

2016

Meas. Sci. Technol.

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The semiconductor thermistor technology is applied as a flow sensor to measure low isothermal air velocities (<2 ms−1). The sensor is subjected to heating and cooling cycles controlled by a multifunctional timer. In the heating stage, the alternating current of a main AC power supply source guarantees a uniform thermistor temperature distribution. The conditioning circuit assures an adequate increase of the sensors temperature and avoids the thermal disturbance of the flow. The power supply interruption reduces the consumption from the source and extends the sensors life time. In the cooling stage, the resistance variation of the flow sensor is recorded by the measuring chain. The resistive sensor parameters proposed vary significantly and feature a high sensitivity to the flow velocity. With the aid of a computer, the data transfer, storage and analysis provides a great advantage over the traditional local anemometer readings. The data acquisition chain has a good repeatability and low standard uncertainties. The proposed method measures isothermal air mean velocities from 0.1 ms−1 to 2 ms−1 with a standard uncertainty error less than 4%.

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International Space Station Node 3 CFD Ventilation Modeling for Early Ingress and Nominal Operation

Cited by 2 publications

References 1 publication

CFD Modeling of Water Droplet Transport for ISS Hygiene Activity Application

CFD Modeling of Water Droplet Transport for ISS Hygiene Activity Application

Thermistor based, low velocity isothermal, air flow sensor

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