Blowdown Noise‐Analysis and Control

Supersonic Blowdown Wind Tunnel Control Using LabVIEW

A computer-based, proportional-integral control system for supersonic blowdown wind tunnels was developed in a LabVIEW environment. The control algorithm is based on numerically integrating the differential equations used to model a supersonic blowdown wind tunnel in which the proportional and integral control terms were added and tuned in a simulation to determine their appropriate values. Val...

Resource Congruence and Forest Regeneration following an Experimental Hurricane Blowdown

Catastrophic uprooting of forest canopy trees creates mounds, pits, and other microsites that provide opportunities for regeneration of particular species. We measured environmental factors on five types of microsites created by simulated blowdown of a mixed deciduous forest in central New England, United States. We then estimated spatial variation in resource levels and quantified congruence a...

Human reliability analysis of an offshore emergency blowdown system.

An offshore platform depressurisation (blowdown) system was designed such that control in emergencies necessitated operator actions over a short space of time. The system design for these operations was analysed using a simple and pragmatic human reliability approach, embedded within a comprehensive risk assessment. The human reliability analysis identified several ways in which human actions c...

Pre-programmed Controller for a Supersonic Blowdown Tunnel

Compaction, Permeability, and Fluid Flow in Brent-Type Reservoirs Under Depletion and Pressure Blowdown

Compaction-induced permeability reduction in a producing reservoir rock/soil can be significant, but nevertheless is often neglected or overly simplified in reservoir simulations. Provided examples show that the commonly used compaction models in reservoir simulators are not capable of capturing the actual spatial variation of the compaction, which generally is more complex than the simplified ...