Study of the Emitted Dose After Two Separate Inhalations at Different Inhalation Flow Rates and Volumes and an Assessment of Aerodynamic Characteristics of Indacaterol Onbrez Breezhaler® 150 and 300 μg

The paper presents measurements of the steady aerodynamic characteristics of a series of five radial vaneless diffusers with walls varying from mildly divergent to strongly convergent. The static pressure recovery was determined and the flow was traversed at the inlet and the outlet of the diffuser for a broad range of flow rates in each case. It was found that wall convergence results in a negative (stabilizing) slope in the pressure rise curve for the diffuser. Furthermore, at high flow rates convergence was found to reduce the pressure recovery far less than one would expect and at intermediate flow rates convergence actually improved the pressure recovery. The better-than-expected performance is thought to be closely related to the observed improvement in the flow uniformity at the diffuser outlet when convergent walls are used.

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Aerodynamic characteristics of helicopter engine side air intakes

Aircraft Engineering and Aerospace Technology ◽

10.1108/aeat-03-2017-0082 ◽

2018 ◽

Vol 90 (9) ◽

pp. 1355-1363

Author(s):

Florian Knoth ◽

Christian Breitsamter

Keyword(s):

Mass Flow ◽

Aerodynamic Characteristics ◽

Operating Conditions ◽

Scale Model ◽

Pressure Probe ◽

Data Set ◽

Flow Rates ◽

Content Type ◽

Plenum Chamber ◽

Mass Flow Rates

PurposeAerodynamic characteristics of engine side air intakes for a lightweight helicopter are investigated aiming to achieve an efficient engine airframe integration. Design/methodology/approachOn a novel full-scale model of a helicopter fuselage section, a comprehensive experimental data set is obtained by wind tunnel testing. Different plenum chamber types along with static side intake and semi-dynamic side intake configurations are considered. Engine mass flow rates corresponding to the power requirements of realistic helicopter operating conditions are reproduced. For a variety of freestream velocities and mass flow rates, five-hole pressure probe data in the aerodynamic interface plane and local surface pressure distributions are compared for the geometries. FindingsIn low-speed conditions, unshielded, sideways facing air intakes yield lowest distortion levels and total pressure losses. In fast forward flight condition, a forward-facing intake shape is most beneficial. Additionally, the influence of an intake grid and plenum chamber splitter is evaluated. Originality/valueThe intake testing approach and the trends found can be applied to other novel helicopter intakes in early development stages to improve engine airframe integration and decrease development times.

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Aerodynamic Characteristics of Tracheostomy Speaking Valves

Journal of Speech Language and Hearing Research ◽

10.1044/jshr.3603.529 ◽

1993 ◽

Vol 36 (3) ◽

pp. 529-532 ◽

Cited By ~ 12

Author(s):

Lisa Fornataro-Clerici ◽

David J. Zajac

Keyword(s):

Steady State ◽

Speech Production ◽

Clinical Significance ◽

Tracheostomy Tube ◽

Flow Characteristics ◽

Aerodynamic Characteristics ◽

Future Research ◽

Steady State Flow ◽

Upper Airways ◽

Flow Rates

Pressure-flow characteristics were determined for four different one-way valves used for speech production in the patient who has had a tracheotomy. Each valve was tested at steady-state flow rates of 150, 250, 350, and 450 ml/sec in isolation and attached to a tracheostomy tube. Results indicated significant differences in resistance among the valves. The resistance of one valve was substantially greater than that of the normal upper airways. It is suggested that future research determine the clinical significance, if any, of these differences relative to speech and respiratory behaviors in tracheostomized patients.

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Automation of Process Control in Chemical Plant

ACMIT Proceedings ◽

10.33555/acmit.v2i1.3 ◽

2015 ◽

Vol 2 (1) ◽

pp. 6-12

Author(s):

Agus Sugiarta ◽

Houtman P. Siregar ◽

Dedy Loebis

Keyword(s):

Process Control ◽

Pid Control ◽

Control Algorithm ◽

Chemical Engineering ◽

Chemical Plant ◽

Raw Material ◽

Flow Rates ◽

Material Supply ◽

Wide Range ◽

Inherent Problem

Automation of process control in chemical plant is an inspiring application field of mechatronicengineering. In order to understand the complexity of the automation and its application requireknowledges of chemical engineering, mechatronic and other numerous interconnected studies.The background of this paper is an inherent problem of overheating due to lack of level controlsystem. The objective of this research is to control the dynamic process of desired level more tightlywhich is able to stabilize raw material supply into the chemical plant system.The chemical plant is operated within a wide range of feed compositions and flow rates whichmake the process control become difficult. This research uses modelling for efficiency reason andanalyzes the model by PID control algorithm along with its simulations by using Matlab.

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