Some Parameter Boundaries Governing Microgravity Pool Boiling Modes

Some parameter boundaries governing microgravity pool boiling modes.

Pool boiling experiments were conducted in microgravity on five space shuttle flights, using a flat plate heater consisting of a semitransparent thin gold film deposited on a quartz substrate that also acted as a resistance thermometer. The test fluid was R-113, and the vapor bubble behavior at the heater surface was photographed from beneath as well as from the side. Each flight consisted of a...

Momentum effects in steady nucleate pool boiling during microgravity.

Pool boiling experiments were conducted in microgravity on five space shuttle flights, using a flat plate heater consisting of a semitransparent thin gold film deposited on a quartz substrate that also acted as a resistance thermometer. The test fluid was R-113, and the vapor bubble behavior at the heater surface was photographed from beneath as well as from the side. Each flight consisted of a...

Development of a Boiling Regime Map and Gravity Scaling Parameter for Pool Boiling Heat Transfer

Flow boiling CHF in microgravity

Poor understanding of flow boiling in microgravity has recently emerged as a key obstacle to the development of many types of power generation and life support systems intended for space exploration. This study examines flow boiling CHF in microgravity that was achieved in parabolic flight experiments with FC-72 onboard NASA s KC-135 turbojet. At high heat fluxes, bubbles quickly coalesced into...

Secondary pool boiling effects