NUMERICAL MODELLING OF CRYOGENIC TANK CHILLDOWN USING CHARGE-HOLD-VENT AND TANK PRESSURE CONTROL IN NO-VENT FILL OPERATION

Description

<p> </p>
<p>Over the last few years, there has been a concerted effort to develop and validate models<br>
aiding the development of cryogenic refueling technologies. This effort is focused on the goal<br>
of one day being able to refuel and store cryogenic propellants in the low gravity environ-<br>
ment of space. The purpose of this research is to leverage the capabilities of some of these<br>
recently developed models to create new ones and model more phenomena related to the<br>
space applications of cryogenics.<br>
The modelling work presented here is focused in the areas of cryogenic tank chilldown<br>
and tank pressure control during storage/transfer. These tools are meant to help inform<br>
future experiments being performed at the Glenn Research Center and elsewhere.<br>
The model focusing on cryogenic tank chilldown provides a transient approach using<br>
the charge-hold-vent (CHV) methodology to calculate the mass and time required to chill<br>
a tank down to a desired temperature. Building on the 1-g Universal No-Vent Fill model<br>
developed by NASA, the model captures the flashing of pooling liquid during the rapid<br>
de-pressurization caused during the vent stage of the chilldown process. The model is com-<br>
pared against two different datasets and successfully predicts pressure response throughout<br>
the process to within 22%.<br>
The thermodynamic vent system (TVS) model has been designed to be seamlessly inte-<br>
grated into the 1-g Universal No-Vent Fill model to predict condensation and heat transfer<br>
provided by the TVS during a no-vent fill. The TVS coil is spatially discretized and the<br>
axial temperature distribution solved for. The model is capable of adapting to a rapidly<br>
lowering or rising fill level that can lower the overall heat removal provided by the TVS.<br>
While the heat removal is of primary importance, by capturing secondary phenomena such<br>
as two-phase pressure drop, the TVS model is also capable of informing design decisions for<br>
future systems. The model is compared against three test cases and predicts heat removal<br>
to within 2%.<br>
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</p>
<p> </p>

Links & Downloads

1. 10.25394/pgs.22350931.v1

Tags

Cryogenics

Tank Chilldown

Propellant Transfer

Boiling

Additional Fields

Identifer	oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/22350931
Date	29 March 2023
Creators	Martin D Schmeidler (14852374)
Source Sets	Purdue University
Detected Language	English
Type	Text, Thesis
Rights	CC BY 4.0
Relation	https://figshare.com/articles/thesis/NUMERICAL_MODELLING_OF_CRYOGENIC_TANK_CHILLDOWN_USING_CHARGE-HOLD-VENT_AND_TANK_PRESSURE_CONTROL_IN_NO-VENT_FILL_OPERATION/22350931