Evaluation of a method for analyzing the aperture region of two-dimensional external compression inlets

1985 ◽  
Author(s):  
A. CAMPBELL ◽  
C. FORESTER
Keyword(s):  
Two Dimensional ◽  
External Compression

scholarly journals Multiplanar and two-dimensional imaging of central airway stenting with multidetector computed tomography

2012 ◽  
Vol 7 ◽  
Author(s):  
Mehmet Akif Ozgul ◽  
Guler Ozgul ◽  
Erdogan Cetinkaya ◽  
Yasin Abul ◽  
Gamze Kirkil ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Multidetector Computed Tomography ◽  
Slice Thickness ◽  
Two Dimensional ◽  
External Compression ◽  
Non Invasive ◽  
Airway Stenting ◽  
Dimensional Reconstruction ◽  
Stent Diameter

Background: Multidetector computed tomography (MDCT) provides guidance for primary screening of the central airways. The aim of our study was assessing the contribution of multidetector computed tomography- two dimensional reconstruction in the management of patients with tracheobronchial stenosis prior to the procedure and during a short follow up period of 3 months after the endobronchial treatment. Methods: This is a retrospective study with data collected from an electronic database and from the medical records. Patients evaluated with MDCT and who had undergone a stenting procedure were included. A Philips RSGDT 07605 model MDCT was used, and slice thickness, 3 mm; overlap, 1.5 mm; matrix, 512x512; mass, 90 and kV, 120 were evaluated. The diameters of the airways 10 mm proximal and 10 mm distal to the obstruction were measured and the stent diameter (D) was determined from the average between D upper and D lower. Results: Fifty-six patients, 14 (25%) women and 42 (75%) men, mean age 55.3 ± 13.2 years (range: 16-79 years), were assessed by MDCT and then treated with placement of an endobronchial stent. A computed tomography review was made with 6 detector Philips RSGDT 07605 multidetector computed tomography device. Endobronchial therapy was provided for the patients with endoluminal lesions. Stents were placed into the area of stenosis in patients with external compression after dilatation and debulking procedures had been carried out. In one patient the migration of a stent was detected during the follow up period by using MDCT. Conclusions: MDCT helps to define stent size, length and type in patients who are suitable for endobronchial stinting. This is a non-invasive, reliable method that helps decisions about optimal stent size and position, thus reducing complications.

Subcritical flow studies on two-dimensional external compression supersonic inlets

1992 ◽  
Vol 8 (4) ◽  
pp. 849-856 ◽  
Author(s):  
K. Kapoor ◽  
T. G. Pai ◽  
B. N. Pamadi
Keyword(s):  
Two Dimensional ◽  
External Compression ◽  
Subcritical Flow

scholarly journals Alleviation of lateral spillage of two-dimensional hypersonic inlet using waverider-configuration chines

2020 ◽  
Vol 34 (14n16) ◽  
pp. 2040074
Author(s):  
Jian Zhai ◽  
Chen-An Zhang ◽  
Fa-Min Wang ◽  
Wei-Wei Zhang
Keyword(s):  
Mass Flow ◽  
Design Method ◽  
Three Dimensional ◽  
Major Type ◽  
Two Dimensional ◽  
Flow Ratio ◽  
Flow Uniformity ◽  
External Compression ◽  
Hypersonic Inlet ◽  
Mass Flow Ratio

Hypersonic inlet is an important part of the propulsion system of hypersonic air-breathing vehicles. However, the performance of the two-dimensional hypersonic inlet, a major type of hypersonic inlets, is considerably deteriorated for lateral spillage. In this study, waverider-configuration chines mounted on the lateral sides of a two-dimensional three-staged external-compression hypersonic inlet for a Mach number of 6.0 are investigated to determine their ability to alleviate the lateral spillage. The chines are built by using a waverider design method. The numerical results suggest that a severe flow spillage induced by three-dimensional effect shows up near the lateral edge of the inlet without chines, which degrades the mass-flow ratio and flow uniformity. In contrast, the waverider-configuration chines effectively alleviate the lateral spillage. Consequently, the mass-flow ratio and the flow uniformity are both improved significantly.

scholarly journals Vortex Generators in a Two-Dimensional External-Compression Supersonic Inlet

2018 ◽  
Vol 34 (2) ◽  
pp. 521-538 ◽  
Author(s):  
Ezgihan Baydar ◽  
Frank K. Lu ◽  
John W. Slater
Keyword(s):  
Vortex Generators ◽  
Two Dimensional ◽  
External Compression ◽  
Supersonic Inlet
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